问题 解答题

用你喜欢的方法计算下面各题.

4.32-4.32×0.9

49×0.125×8

0.67×3+0.67×97

4.9×9.9.

答案

(1)4.32-4.32×0.9,

=4.32×(1-0.9),

=4.32×0.1,

=0.432;

(2)49×0.125×8,

=49×(0.125×8),

=49×1,

=49;

(3)0.67×3+0.67×97,

=0.67×(3+97),

=0.67×100,

=67;

(4)4.9×9.9,

=4.9×(10-0.1),

=4.9×10-4.9×0.1,

=49-0.49,

=48.51.

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