What shortcut can you use to multiply tens by tens, such as 40x60"

asked Jan 10, 2015 142k views

3 votes

by Ensc

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1 vote

[tex] Estimate: 40x60 6x4 = 24 0x0=0 60x40= 2,400

Chendriksen answered Jan 12, 2015

7.3k points

3 votes

Multiply the first number , such as 4 and 6, and then add however many 0's there are

Dpavlin answered Jan 14, 2015

7.3k points

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