Multiply Multi-Digit Numbers - 4th Grade Math
Card 1 of 20
What is $7\times 3{,}462$?
What is $7\times 3{,}462$?
Tap to reveal answer
$24{,}234$. Multiply each place value: $7×3000 + 7×400 + 7×60 + 7×2$.
$24{,}234$. Multiply each place value: $7×3000 + 7×400 + 7×60 + 7×2$.
← Didn't Know|Knew It →
Find and correct the error: A student wrote $18\times 30=5400$. What is the correct product?
Find and correct the error: A student wrote $18\times 30=5400$. What is the correct product?
Tap to reveal answer
$540$. Student added extra zero; $18×30 = 540$.
$540$. Student added extra zero; $18×30 = 540$.
← Didn't Know|Knew It →
What is $9\times 2{,}507$?
What is $9\times 2{,}507$?
Tap to reveal answer
$22{,}563$. Use place value: $9×2000 + 9×500 + 9×7 = 22{,}563$.
$22{,}563$. Use place value: $9×2000 + 9×500 + 9×7 = 22{,}563$.
← Didn't Know|Knew It →
What is $27\times 34$?
What is $27\times 34$?
Tap to reveal answer
$918$. Split as $(20+7)(30+4) = 600+80+210+28$.
$918$. Split as $(20+7)(30+4) = 600+80+210+28$.
← Didn't Know|Knew It →
What is $6\times 4{,}305$?
What is $6\times 4{,}305$?
Tap to reveal answer
$25{,}830$. Multiply by place value: $6×4000 + 6×300 + 6×5$.
$25{,}830$. Multiply by place value: $6×4000 + 6×300 + 6×5$.
← Didn't Know|Knew It →
What is $99\times 45$?
What is $99\times 45$?
Tap to reveal answer
$4{,}455$. Calculate $(100-1)×45 = 4{,}500 - 45$.
$4{,}455$. Calculate $(100-1)×45 = 4{,}500 - 45$.
← Didn't Know|Knew It →
Identify the missing number: $3{,}214\times 6=(3{,}000\times 6)+(200\times 6)+(10\times 6)+(?\times 6)$.
Identify the missing number: $3{,}214\times 6=(3{,}000\times 6)+(200\times 6)+(10\times 6)+(?\times 6)$.
Tap to reveal answer
$4$. The ones place of $3{,}214$ is $4$.
$4$. The ones place of $3{,}214$ is $4$.
← Didn't Know|Knew It →
What is $23\times 17$?
What is $23\times 17$?
Tap to reveal answer
$391$. Use area model: $(20+3)(10+7) = 200+140+30+21$.
$391$. Use area model: $(20+3)(10+7) = 200+140+30+21$.
← Didn't Know|Knew It →
What is $6{,}125\times 8$?
What is $6{,}125\times 8$?
Tap to reveal answer
$49{,}000$. Multiply each digit by $8$ and regroup as needed.
$49{,}000$. Multiply each digit by $8$ and regroup as needed.
← Didn't Know|Knew It →
What is $3{,}090\times 9$?
What is $3{,}090\times 9$?
Tap to reveal answer
$27{,}810$. Multiply each digit by $9$ and regroup as needed.
$27{,}810$. Multiply each digit by $9$ and regroup as needed.
← Didn't Know|Knew It →
What is $2{,}048\times 6$?
What is $2{,}048\times 6$?
Tap to reveal answer
$12{,}288$. Multiply each digit by $6$ and regroup as needed.
$12{,}288$. Multiply each digit by $6$ and regroup as needed.
← Didn't Know|Knew It →
Find the missing number: $5\times (800+40+6)=4{,}000+200+\square$.
Find the missing number: $5\times (800+40+6)=4{,}000+200+\square$.
Tap to reveal answer
$30$. $5\times 6=30$, so the missing number is $30$.
$30$. $5\times 6=30$, so the missing number is $30$.
← Didn't Know|Knew It →
What is $34\times 27$?
What is $34\times 27$?
Tap to reveal answer
$918$. Use partial products: $(30\times 27)+(4\times 27)$.
$918$. Use partial products: $(30\times 27)+(4\times 27)$.
← Didn't Know|Knew It →
What is $46\times 18$?
What is $46\times 18$?
Tap to reveal answer
$828$. Use partial products: $(40\times 18)+(6\times 18)$.
$828$. Use partial products: $(40\times 18)+(6\times 18)$.
← Didn't Know|Knew It →
What is $59\times 32$?
What is $59\times 32$?
Tap to reveal answer
$1{,}888$. Use partial products: $(50\times 32)+(9\times 32)$.
$1{,}888$. Use partial products: $(50\times 32)+(9\times 32)$.
← Didn't Know|Knew It →
What is $25\times 48$?
What is $25\times 48$?
Tap to reveal answer
$1{,}200$. Use partial products: $(25\times 40)+(25\times 8)$.
$1{,}200$. Use partial products: $(25\times 40)+(25\times 8)$.
← Didn't Know|Knew It →
What is $73\times 16$?
What is $73\times 16$?
Tap to reveal answer
$1{,}168$. Use partial products: $(70\times 16)+(3\times 16)$.
$1{,}168$. Use partial products: $(70\times 16)+(3\times 16)$.
← Didn't Know|Knew It →
Use an area model split: If $23\times 15=(20+3)(10+5)$, what is the total?
Use an area model split: If $23\times 15=(20+3)(10+5)$, what is the total?
Tap to reveal answer
$345$. $200+100+30+15=345$ using area model sections.
$345$. $200+100+30+15=345$ using area model sections.
← Didn't Know|Knew It →
What equation matches a rectangular array with $6$ rows and $14$ columns?
What equation matches a rectangular array with $6$ rows and $14$ columns?
Tap to reveal answer
$6\times 14=84$. Total items equals rows times columns.
$6\times 14=84$. Total items equals rows times columns.
← Didn't Know|Knew It →
Estimate using place value: $3{,}892\times 6\approx$ what (round $3{,}892$ to the nearest thousand)?
Estimate using place value: $3{,}892\times 6\approx$ what (round $3{,}892$ to the nearest thousand)?
Tap to reveal answer
$24{,}000$. Round $3{,}892$ to $4{,}000$, then $4{,}000\times 6$.
$24{,}000$. Round $3{,}892$ to $4{,}000$, then $4{,}000\times 6$.
← Didn't Know|Knew It →