Question

Explain how using basic facts can help you find 10 x 20 x 30 x 40 mentally

Answer 1

10 x 20 x 30 x 40 = 24000
1 x 2 x 3 x 4 = 24
Count up the extra zeros, (20 30 40) and theres 3 extra zeros
Put them at the end of 24 to get the answer.

Answer 2

Thanks to the person that answered this