Explain how using basic facts can help you find 10 x 20 x 30 x 40 mentally
2 answers:
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.
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