Multiply by Multiples of 10 - 3rd Grade Math
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What is the value of $7 \times 3 \times 10$?
What is the value of $7 \times 3 \times 10$?
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$210$. Multiply in any order: $7 \times 3 = 21$, then $21 \times 10 = 210$.
$210$. Multiply in any order: $7 \times 3 = 21$, then $21 \times 10 = 210$.
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What is $9 \times 80$?
What is $9 \times 80$?
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$720$. Calculate $9 \times 8 = 72$, then append one zero.
$720$. Calculate $9 \times 8 = 72$, then append one zero.
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Which expression is equivalent to $4 \times 60$: $4 \times 6 \times 10$ or $4 \times 10 \times 60$?
Which expression is equivalent to $4 \times 60$: $4 \times 6 \times 10$ or $4 \times 10 \times 60$?
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$4 \times 6 \times 10$. Break 60 into $6 \times 10$ to use place value strategy.
$4 \times 6 \times 10$. Break 60 into $6 \times 10$ to use place value strategy.
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Find and correct the error: $3 \times 80 = 2400$.
Find and correct the error: $3 \times 80 = 2400$.
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Correct: $3 \times 80 = 240$. The extra zero was incorrectly added; $3 \times 8 = 24$ plus one zero.
Correct: $3 \times 80 = 240$. The extra zero was incorrectly added; $3 \times 8 = 24$ plus one zero.
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What is $9 \times 20$?
What is $9 \times 20$?
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$180$. Calculate $9 \times 2 = 18$, then append one zero.
$180$. Calculate $9 \times 2 = 18$, then append one zero.
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What is $7 \times 60$?
What is $7 \times 60$?
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$420$. Calculate $7 \times 6 = 42$, then append one zero.
$420$. Calculate $7 \times 6 = 42$, then append one zero.
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State the commutative property for multiplication using $6 \times 70$ as the example.
State the commutative property for multiplication using $6 \times 70$ as the example.
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$6 \times 70 = 70 \times 6$. Order doesn't matter in multiplication.
$6 \times 70 = 70 \times 6$. Order doesn't matter in multiplication.
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What is $0 \times 70$?
What is $0 \times 70$?
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$0$. Zero times any number equals zero.
$0$. Zero times any number equals zero.
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What is $1 \times 80$?
What is $1 \times 80$?
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$80$. Any number times 1 equals itself.
$80$. Any number times 1 equals itself.
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What is $2 \times 90$?
What is $2 \times 90$?
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$180$. Calculate $2 \times 9 = 18$, then append one zero.
$180$. Calculate $2 \times 9 = 18$, then append one zero.
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What is $3 \times 40$?
What is $3 \times 40$?
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$120$. Calculate $3 \times 4 = 12$, then append one zero.
$120$. Calculate $3 \times 4 = 12$, then append one zero.
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What is $8 \times 50$?
What is $8 \times 50$?
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$400$. Calculate $8 \times 5 = 40$, then append one zero.
$400$. Calculate $8 \times 5 = 40$, then append one zero.
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What is $4 \times 90$?
What is $4 \times 90$?
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$360$. Calculate $4 \times 9 = 36$, then append one zero.
$360$. Calculate $4 \times 9 = 36$, then append one zero.
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What is $4 \times 30$?
What is $4 \times 30$?
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$120$. Multiply $4 \times 3 = 12$, then add a zero.
$120$. Multiply $4 \times 3 = 12$, then add a zero.
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What is $5 \times 70$?
What is $5 \times 70$?
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$350$. Multiply $5 \times 7 = 35$, then add a zero.
$350$. Multiply $5 \times 7 = 35$, then add a zero.
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