35*18简便运算怎么算?

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35*18简便运算怎么算?

35*18简便运算怎么算?
35*18简便运算怎么算?

35*18简便运算怎么算?
35*18
=35*2*9
=70*9
=630

35*18
=7*5*18
=7*90
=630

5×7×2×9=(2×5)×(7×9)=630

35*18
=35*(20-2)
=35*20-35*2
=700-70
=630