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4th Grade Math : 4th Grade Math

Study concepts, example questions & explanations for 4th Grade Math

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All 4th Grade Math Resources

8 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #1 : 4th Grade Math

Round $932\textup,412$ to the nearest ten.

Possible Answers:

$932\textup,500$

$932\textup,000$

$932\textup,400$

$932\textup,410$

Correct answer:

$932\textup,410$

Explanation:

When we round a number to the nearest ten we look to the ones place to tell us if we round up or down.

$932\textup,41{\color{Blue} 2}$

If the number in our ones place is or greater, we round up. If the number in the ones place is or less, we round down. When we round up, the number in the tens place increases by and all the other numbers to the right become . When we round down, the number in the tens place stays the same and all the other numbers to the right become .

In this case, is less than so our rounded number is $932\textup,410$

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Example Question #2 : 4th Grade Math

Fill in the blank with the correct sign.

$2 \textup,923$ __________ $2 \textup,921$

Possible Answers:

$\leq$

Correct answer:

Explanation:

$2 \textup,923>2 \textup,921$ because of the digit in the ones place. 3 is greater than 1.

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Example Question #1 : Operations

Solve:

$4\frac{1}{5}+2\frac{1}{5}$

Possible Answers:

$6\frac{3}{5}$

$6\frac{2}{5}$

$6\frac{4}{5}$

$6\frac{1}{5}$

Correct answer:

$6\frac{2}{5}$

Explanation:

When we add mixed numbers, we add whole numbers to whole numbers and fractions to fractions.

4+2=6

$\frac{1}{5}+\frac{1}{5}=\frac{2}{5}$

Remember, when we are adding fractions we must have common denominators and we only add the numerators.

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Example Question #1 : Fractions

Solve:

$\frac{8}{10}=\frac{?}{100}$

Possible Answers:

Correct answer:

Explanation:

To find equivalent fractions, we must always multiply the denominator and the numerator by the same number.

$100\div10=10$ , so we need to multiply the numerator by .

$8\times10=80$

$\frac{8}{10}=\frac{80}{100}$

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Example Question #2 : Fractions

Select the symbol to correctly fill in the blank below.

$\frac{1}{2}$ __________ $\frac{6}{12}$

Possible Answers:

Correct answer:

Explanation:

To compare fractions, we need to first make common denominators.

$\frac{1}{2}\times\frac{6}{6}=\frac{6}{12}$

Now that we have common denominators, we can compare numerators. The fraction with the bigger numerator has the greater value.

$\frac{6}{12}=\frac{6}{12}$

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Example Question #3 : 4th Grade Math

What is the length of a room with a perimeter of 70ft and a width of 15ft?

Possible Answers:

23ft

21ft

20ft

22ft

Correct answer:

20ft

Explanation:

P=2l+ 2w

We have the perimeter and the width, so we can plug those values into our equation and solve for our unknown.

70=2l+2(15)

70=2l+30

Subtract from both sides

70-30=2l+28-30

40=2l

Divide by both sides

$\frac{40}{2}=\frac{2l}{2}$

20=l

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Example Question #4 : 4th Grade Math

Does the black line in the figure represent a line of symmetry?

Possible Answers:

Yes

Correct answer:

Yes

Explanation:

When you are trying to decide if a line represents a line of symmetry you can think about folding the figure across that line. Once you make the fold, do all of the parts line up on top?

If yes, then the line represents a line of symmetry.

If no, then the line does not represent a line of symmetry.

This line represents a line of symmetry because if you fold on the black line, then one side would lay on top of the other and the parts would match up.

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Example Question #5 : 4th Grade Math

Solve for x.

150 degrees

Possible Answers:

$60^\circ$

$80^\circ$

$50^\circ$

$70^\circ$

Correct answer:

$60^\circ$

Explanation:

To find the value of x we subtract.

150-90=60

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Example Question #1 : Measurement

Fill in the missing piece of the table.

Screen shot 2015 09 01 at 9.24.25 am

Possible Answers:

$30\textup,000$

$3\textup,000$

$300\textup,000$

$3000\textup,000$

Correct answer:

$300\textup,000$

Explanation:

To solve this problem we can set up a proportion and cross multiply to solve for our unknown.

$\frac{1km}{100\textup,000 cm}=\frac{3km}{x}$

First we cross multiply.

$1km(x)=3km(100\textup,000cm)$

Then we divide each side by 1km to isolate the .

$\frac{1km(x)}{1km}=\frac{3km(100\textup,000cm)}{1km}$

$x=300\textup,000 cm$

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Example Question #2 : Measurement

Fill in the missing piece of the table.

Screen shot 2015 09 01 at 10.22.55 am

Possible Answers:

160

170

180

190 150

Correct answer:

180

Explanation:

To solve this problem we can set up a proportion and cross multiply to solve for our unknown.

$\frac{1hr}{60 min}=\frac{3hr}{x}$

First we cross multiply.

1hr(x)=3hr(60min)

Then we divide each side by 1hr to isolate the .

$\frac{1hr(x)}{1hr}=\frac{3hr(60m)}{1hr}$

x=180 min

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All 4th Grade Math Resources

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4th Grade Math : 4th Grade Math

Study concepts, example questions & explanations for 4th Grade Math

All 4th Grade Math Resources

Example Questions

Example Question #1 : 4th Grade Math

Example Question #2 : 4th Grade Math

Example Question #1 : Operations

Example Question #1 : Fractions

Example Question #2 : Fractions

Example Question #3 : 4th Grade Math

Example Question #4 : 4th Grade Math

Example Question #5 : 4th Grade Math

Example Question #1 : Measurement

Example Question #2 : Measurement

All 4th Grade Math Resources

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