This question tests representing unit fractions on number lines (CCSS.3.NF.2.a), specifically understanding that when the interval from 0 to 1 is partitioned into b equal parts, the first part has size 1/b and its endpoint locates 1/b on the number line. On a number line, the distance from 0 to 1 represents 1 whole. When we divide this interval into b equal parts, each part has size 1/b. The unit fraction 1/b is located at the first tick mark after 0—this is the endpoint of the first equal part starting from 0. For example, if we divide 0 to 1 into 6 equal parts, each part is 1/6, and the first tick mark after 0 is at 1/6. Count: 0, then one part over is 1/6, two parts is 2/6, three parts is 3/6, four parts is 4/6, five parts is 5/6, six parts is 6/6 (which equals 1). In this problem, the number line from 0 to 1 is divided into 6 equal parts. Point A is at the first tick mark after 0. Choice A is correct because the point marked is one equal interval from 0, which represents 1/6. This demonstrates understanding that 1/b is one part from 0 on a partitioned number line. Choice D is incorrect because it identifies position at 6/6 (which equals 1) instead of 1/6. This error occurs when students confuse tick marks with fractions. To help students place unit fractions on number lines: Start by defining 0-1 as the whole. Fold paper strips into b equal parts to show physical division. Mark each fold as a fraction (0, 1/6, 2/6, 3/6, 4/6, 5/6, 1). Emphasize: first mark after 0 is always 1/b. Practice with different denominators (halves, thirds, fourths, sixths, eighths). Count forward from 0: "0, one-sixth, two-sixths, three-sixths, four-sixths, five-sixths, six-sixths." Connect to rulers: each inch divided into smaller equal parts. Use consistent language: "one part from 0" or "first tick mark." Watch for students who confuse position number with fraction value or who count divisions instead of identifying position.

This question tests representing unit fractions on number lines (CCSS.3.NF.2.a), specifically understanding that when the interval from 0 to 1 is partitioned into b equal parts, the first part has size 1/b and its endpoint locates 1/b on the number line. On a number line, the distance from 0 to 1 represents 1 whole. When we divide this interval into b equal parts, each part has size 1/b. The unit fraction 1/b is located at the first tick mark after 0—this is the endpoint of the first equal part starting from 0. For example, if we divide 0 to 1 into 4 equal parts, each part is 1/4, and the first tick mark after 0 is at 1/4. Count: 0, then one part over is 1/4, two parts is 2/4, three parts is 3/4, four parts is 4/4 (which equals 1). In this problem, the number line from 0 to 1 is divided into 3 equal parts. Each of the 3 intervals has length 1/3. Choice B is correct because the point marked is one equal interval from 0, which represents 1/3. This demonstrates understanding that 1/b is one part from 0 on a partitioned number line. Choice C is incorrect because it identifies position at 2/3 instead of 1/3. This error occurs when students don't recognize 1/b as first position. To help students place unit fractions on number lines: Start by defining 0-1 as the whole. Fold paper strips into b equal parts to show physical division. Mark each fold as a fraction (0, 1/4, 2/4, 3/4, 1). Emphasize: first mark after 0 is always 1/b. Practice with different denominators (halves, thirds, fourths, sixths, eighths). Count forward from 0: "0, one-fourth, two-fourths, three-fourths, four-fourths." Connect to rulers: each inch divided into smaller equal parts. Use consistent language: "one part from 0" or "first tick mark." Watch for students who confuse position number with fraction value or who count divisions instead of identifying position.

This question tests representing unit fractions on number lines (CCSS.3.NF.2.a), specifically understanding that when the interval from 0 to 1 is partitioned into b equal parts, the first part has size 1/b and its endpoint locates 1/b on the number line. On a number line, the distance from 0 to 1 represents 1 whole. When we divide this interval into b equal parts, each part has size 1/b. The unit fraction 1/b is located at the first tick mark after 0—this is the endpoint of the first equal part starting from 0. For example, if we divide 0 to 1 into 4 equal parts, each part is 1/4, and the first tick mark after 0 is at 1/4. Count: 0, then one part over is 1/4, two parts is 2/4, three parts is 3/4, four parts is 4/4 (which equals 1). In this problem, the number line from 0 to 1 is divided into 2 equal parts. The first tick mark after 0 represents 1/2. Choice A is correct because 1/2 is located at the first tick mark after 0 when the 0-1 interval is divided into 2 equal parts. This demonstrates understanding that 1/b is one part from 0 on a partitioned number line. Choice D is incorrect because it identifies position at 2/2 or 1 instead of 1/2. This error occurs when students miscount the equal parts. To help students place unit fractions on number lines: Start by defining 0-1 as the whole. Fold paper strips into b equal parts to show physical division. Mark each fold as a fraction (0, 1/4, 2/4, 3/4, 1). Emphasize: first mark after 0 is always 1/b. Practice with different denominators (halves, thirds, fourths, sixths, eighths). Count forward from 0: "0, one-fourth, two-fourths, three-fourths, four-fourths." Connect to rulers: each inch divided into smaller equal parts. Use consistent language: "one part from 0" or "first tick mark." Watch for students who confuse position number with fraction value or who count divisions instead of identifying position.

This question tests representing unit fractions on number lines (CCSS.3.NF.2.a), specifically understanding that when the interval from 0 to 1 is partitioned into b equal parts, the first part has size 1/b and its endpoint locates 1/b on the number line. On a number line, the distance from 0 to 1 represents 1 whole. When we divide this interval into b equal parts, each part has size 1/b. The unit fraction 1/b is located at the first tick mark after 0—this is the endpoint of the first equal part starting from 0. For example, if we divide 0 to 1 into 4 equal parts, each part is 1/4, and the first tick mark after 0 is at 1/4. Count: 0, then one part over is 1/4, two parts is 2/4, three parts is 3/4, four parts is 4/4 (which equals 1). In this problem, the number line from 0 to 1 is divided into 4 equal parts. The first tick mark after 0 represents 1/4. Choice B is correct because 1/4 is located at the first tick mark after 0 when the 0-1 interval is divided into 4 equal parts. This demonstrates understanding that 1/b is one part from 0 on a partitioned number line. Choice A is incorrect because it identifies the position at 0 instead of 1/4. This error occurs when students don't recognize 1/b as first position. To help students place unit fractions on number lines: Start by defining 0-1 as the whole. Fold paper strips into b equal parts to show physical division. Mark each fold as a fraction (0, 1/4, 2/4, 3/4, 1). Emphasize: first mark after 0 is always 1/b. Practice with different denominators (halves, thirds, fourths, sixths, eighths). Count forward from 0: "0, one-fourth, two-fourths, three-fourths, four-fourths." Connect to rulers: each inch divided into smaller equal parts. Use consistent language: "one part from 0" or "first tick mark." Watch for students who confuse position number with fraction value or who count divisions instead of identifying position.

This question tests representing unit fractions on number lines (CCSS.3.NF.2.a), specifically understanding that when the interval from 0 to 1 is partitioned into b equal parts, the first part has size $1/b$ and its endpoint locates $1/b$ on the number line. On a number line, the distance from 0 to 1 represents 1 whole. When we divide this interval into b equal parts, each part has size $1/b$. The unit fraction $1/b$ is located at the first tick mark after 0—this is the endpoint of the first equal part starting from 0. For example, if we divide 0 to 1 into 4 equal parts, each part is $1/4$, and the first tick mark after 0 is at $1/4$. Count: 0, then one part over is $1/4$, two parts is $2/4$, three parts is $3/4$, four parts is $4/4$ (which equals 1). In this problem, the number line from 0 to 1 is divided into 3 equal parts. The first division represents $1/3$. Choice B is correct because $1/3$ is located at the first division when the 0-1 interval is divided into 3 equal parts. This demonstrates understanding that $1/3$ is one part from 0 on a partitioned number line. Choice C is incorrect because it selects $2/3$, which is at the second division instead of the first. This error occurs when students miscount the divisions or confuse positions. To help students place unit fractions on number lines: Start by defining 0-1 as the whole. Fold paper strips into b equal parts to show physical division. Mark each fold as a fraction (0, $1/4$, $2/4$, $3/4$, 1). Emphasize: first mark after 0 is always $1/b$. Practice with different denominators (halves, thirds, fourths, sixths, eighths). Count forward from 0: "0, one-fourth, two-fourths, three-fourths, four-fourths." Connect to rulers: each inch divided into smaller equal parts. Use consistent language: "one part from 0" or "first tick mark." Watch for students who confuse position number with fraction value or who count divisions instead of identifying position.

This question tests representing unit fractions on number lines (CCSS.3.NF.2.a), specifically understanding that when the interval from 0 to 1 is partitioned into b equal parts, the first part has size 1/b and its endpoint locates 1/b on the number line. On a number line, the distance from 0 to 1 represents 1 whole. When we divide this interval into b equal parts, each part has size 1/b. The unit fraction 1/b is located at the first tick mark after 0—this is the endpoint of the first equal part starting from 0. For example, if we divide 0 to 1 into 4 equal parts, each part is 1/4, and the first tick mark after 0 is at 1/4. Count: 0, then one part over is 1/4, two parts is 2/4, three parts is 3/4, four parts is 4/4 (which equals 1). In this problem, the number line from 0 to 1 is divided into 4 equal parts. The first tick mark after 0 represents 1/4. Choice C is correct because it identifies the first tick mark after 0 as 1/4 when the 0-1 interval is divided into 4 equal parts. This demonstrates understanding that 1/4 is one part from 0 on a partitioned number line. Choice B is incorrect because it identifies the position at 3/4 instead of 1/4. This error occurs when students miscount the equal parts or confuse the positions. To help students place unit fractions on number lines: Start by defining 0-1 as the whole. Fold paper strips into b equal parts to show physical division. Mark each fold as a fraction (0, 1/4, 2/4, 3/4, 1). Emphasize: first mark after 0 is always 1/b. Practice with different denominators (halves, thirds, fourths, sixths, eighths). Count forward from 0: "0, one-fourth, two-fourths, three-fourths, four-fourths." Connect to rulers: each inch divided into smaller equal parts. Use consistent language: "one part from 0" or "first tick mark." Watch for students who confuse position number with fraction value or who count divisions instead of identifying position.

This question tests representing unit fractions on number lines (CCSS.3.NF.2.a), specifically understanding that when the interval from 0 to 1 is partitioned into b equal parts, the first part has size 1/b and its endpoint locates 1/b on the number line. On a number line, the distance from 0 to 1 represents 1 whole. When we divide this interval into b equal parts, each part has size 1/b. The unit fraction 1/b is located at the first tick mark after 0—this is the endpoint of the first equal part starting from 0. For example, if we divide 0 to 1 into 4 equal parts, each part is 1/4, and the first tick mark after 0 is at 1/4. Count: 0, then one part over is 1/4, two parts is 2/4, three parts is 3/4, four parts is 4/4 (which equals 1). In this problem, the number line from 0 to 1 is divided into 3 equal parts. The first tick mark after 0 represents 1/3. Choice B is correct because it identifies the first tick mark after 0 as 1/3 when the 0-1 interval is divided into 3 equal parts. This demonstrates understanding that 1/3 is one part from 0 on a partitioned number line. Choice A is incorrect because it identifies the position at 2/3 instead of 1/3. This error occurs when students count extra parts or confuse the first position. To help students place unit fractions on number lines: Start by defining 0-1 as the whole. Fold paper strips into b equal parts to show physical division. Mark each fold as a fraction (0, 1/4, 2/4, 3/4, 1). Emphasize: first mark after 0 is always 1/b. Practice with different denominators (halves, thirds, fourths, sixths, eighths). Count forward from 0: "0, one-fourth, two-fourths, three-fourths, four-fourths." Connect to rulers: each inch divided into smaller equal parts. Use consistent language: "one part from 0" or "first tick mark." Watch for students who confuse position number with fraction value or who count divisions instead of identifying position.

This question tests representing unit fractions on number lines (CCSS.3.NF.2.a), specifically understanding that when the interval from 0 to 1 is partitioned into b equal parts, the first part has size 1/b and its endpoint locates 1/b on the number line. On a number line, the distance from 0 to 1 represents 1 whole. When we divide this interval into b equal parts, each part has size 1/b. The unit fraction 1/b is located at the first tick mark after 0—this is the endpoint of the first equal part starting from 0. For example, if we divide 0 to 1 into 4 equal parts, each part is 1/4, and the first tick mark after 0 is at 1/4. Count: 0, then one part over is 1/4, two parts is 2/4, three parts is 3/4, four parts is 4/4 (which equals 1). In this problem, the number line from 0 to 1 is divided into 4 equal parts. Point X is marked at one interval from 0, which represents 1/4. Choice C is correct because the point marked is one equal interval from 0, which represents 1/4. This demonstrates understanding that 1/4 is one part from 0 on a partitioned number line. Choice D is incorrect because it selects 3/4, which is at the third interval instead of the first. This error occurs when students miscount the intervals or confuse positions. To help students place unit fractions on number lines: Start by defining 0-1 as the whole. Fold paper strips into b equal parts to show physical division. Mark each fold as a fraction (0, 1/4, 2/4, 3/4, 1). Emphasize: first mark after 0 is always 1/b. Practice with different denominators (halves, thirds, fourths, sixths, eighths). Count forward from 0: "0, one-fourth, two-fourths, three-fourths, four-fourths." Connect to rulers: each inch divided into smaller equal parts. Use consistent language: "one part from 0" or "first tick mark." Watch for students who confuse position number with fraction value or who count divisions instead of identifying position.

This question tests representing unit fractions on number lines (CCSS.3.NF.2.a), specifically understanding that when the interval from 0 to 1 is partitioned into b equal parts, the first part has size 1/b and its endpoint locates 1/b on the number line. On a number line, the distance from 0 to 1 represents 1 whole. When we divide this interval into b equal parts, each part has size 1/b. The unit fraction 1/b is located at the first tick mark after 0—this is the endpoint of the first equal part starting from 0. For example, if we divide 0 to 1 into 8 equal parts, each part is 1/8, and the first tick mark after 0 is at 1/8. Count: 0, then one part over is 1/8, two parts is 2/8, three parts is 3/8, and so on up to 8/8 (which equals 1). In this problem, the number line from 0 to 1 is divided into 8 equal parts. Point marked is one interval from 0. Choice A is correct because this position is the endpoint of the first 1/8 part. This demonstrates understanding that 1/b is one part from 0 on a partitioned number line. Choice B is incorrect because it identifies position at 4/8 instead of 1/8. This error occurs when students count from wrong direction. To help students place unit fractions on number lines: Start by defining 0-1 as the whole. Fold paper strips into b equal parts to show physical division. Mark each fold as a fraction (0, 1/8, 2/8, 3/8, 4/8, 5/8, 6/8, 7/8, 1). Emphasize: first mark after 0 is always 1/b. Practice with different denominators (halves, thirds, fourths, sixths, eighths). Count forward from 0: "0, one-eighth, two-eighths, three-eighths, four-eighths." Connect to rulers: each inch divided into smaller equal parts. Use consistent language: "one part from 0" or "first tick mark." Watch for students who confuse position number with fraction value or who count divisions instead of identifying position.

This question tests representing unit fractions on number lines (CCSS.3.NF.2.a), specifically understanding that when the interval from 0 to 1 is partitioned into b equal parts, the first part has size 1/b and its endpoint locates 1/b on the number line. On a number line, the distance from 0 to 1 represents 1 whole. When we divide this interval into b equal parts, each part has size 1/b. The unit fraction 1/b is located at the first tick mark after 0—this is the endpoint of the first equal part starting from 0. For example, if we divide 0 to 1 into 4 equal parts, each part is 1/4, and the first tick mark after 0 is at 1/4. Count: 0, then one part over is 1/4, two parts is 2/4, three parts is 3/4, four parts is 4/4 (which equals 1). In this problem, the number line from 0 to 1 is divided into 8 equal parts. The first tick mark after 0 represents 1/8. Choice B is correct because the point marked is one equal interval from 0, which represents 1/8. This demonstrates understanding that 1/b is one part from 0 on a partitioned number line. Choice C is incorrect because it identifies position at 3/8 instead of 1/8. This error occurs when students miscount the equal parts. To help students place unit fractions on number lines: Start by defining 0-1 as the whole. Fold paper strips into b equal parts to show physical division. Mark each fold as a fraction (0, 1/4, 2/4, 3/4, 1). Emphasize: first mark after 0 is always 1/b. Practice with different denominators (halves, thirds, fourths, sixths, eighths). Count forward from 0: "0, one-fourth, two-fourths, three-fourths, four-fourths." Connect to rulers: each inch divided into smaller equal parts. Use consistent language: "one part from 0" or "first tick mark." Watch for students who confuse position number with fraction value or who count divisions instead of identifying position.