问题 解答题

用简便方法计算.

9×37+9×63

0.9+1.08+0.92+0.1

8×5×125×40

1.38+1.75+0.25.

答案

(1)9×37+9×63,

=9×(37+63),

=9×100,

=900;

(2)0.9+1.08+0.92+0.1,

=(0.9+0.1)+(1.08+0.92),

=1+2,

=3;

(3)8×5×125×40,

=(8×125)×(5×40),

=1000×200,

=200000;

(4)1.38+1.75+0.25,

=1.38+(1.75+0.25),

=1.38+2,

=3.38.

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