Explain using the basic fact can help you find 10×20×30×40 mentally

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asked Mar 24, 2017 129k views

1 Answer

Vork · Answer 1 · 2017-03-27T17:00:28+0000

Multiply 20 by 10 first
Then 200 by 30 which is 6000
Then 6000 by 40 which is 240000

Basically just multiply the numbers that's aren't 0
Like 2 in 200 times 3 in 30
Which is 6 then add the 0s so 6+000=6000

Explain using the basic fact can help you find 10×20×30×40 mentally

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