问题 解答题

用你喜欢的方法计算.

3.5×4.2+3.5×5.8;

(0.92+0.34)×9;

(8.3-0.25)×(0.6+3.7);

4×2.73×0.25.

答案

(1)3.5×4.2+3.5×5.8

=3.5×(4.2+5.8)

=3.5×10

=35;

(2)(0.92+0.34)×9

=1.26×9

=11.34;

(3)(8.3-0.25)×(0.6+3.7)

=8.05×4.3

=34.615;

(4)4×2.73×0.25

=4×0.25×2.73

=1×2.73

=2.73.

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