Explain how you can use doubles when multiplying with 4 to find 4 times 8
2 answers:
Multiplying by 4 using the doubles strategy utilizes the fact that 4 is double of 2. Hence, 4 time any number is double of 2 times that number.
Thus, given 4 x 8, it can be evaluated using the double strategy as follows 2 x 8 + 2 x 8 = 16 + 16 = 32.
Hi.
4 x 8
= 2 x 2 x 8
= 2 x (2 x 8)
= (2 x 8) + (2 x 8)
= 16 + 16
= 32
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