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Using the associative law, we can group the 25 with the 4. 25 x 4 = 100, and 77 x100 = 7700. So 77 x (25 x 4) = 7700
Another way, if the values don't lend themselves to such elegant manipulation, is to spilt the numbers into single-digit factors. Makes for more work but may sometimes be easier than long-multiplication.
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How can you use properties of multiplication to determine what the factors are with two same product?
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How does adding partial products help solve multiplication problem?
How does adding partial products help solve a multiplication problem
How can knowing the multiplication properties help you evaluate 5 times 20 times 63?
According to the associative property when more than two numbers are multiplied, the order in which the numbers are multiplied will give the same product.
How can knowing that multiplication is repeated addition and division is repeated subtraction help you understand that multiplication and division are related?
the whole reason is this: multiplication is adding to that number in groups and division is subtracting from a number in groups.
How can a multiplication model help you solve problem?
By show the number and add it when it done
