问题 解答题
用你喜欢的方法计算.
①0.46×101②1.25×0.25×3.2③4.56×9+4.56④100.1×101-100.1.
答案

①0.46×101,

=0.46×(100+1),

=46+0.46,

=46.46;

②1.25×0.25×3.2,

=1.25×0.25×0.8×4,

=(1.25×0.8)×(0.25×4),

=1×1,

=1;

③4.56×9+4.56,

=4.56×(9+1),

=4.56×10,

=45.6;

④100.1×101-100.1,

=100.1×(101-1),

=100.1×100,

=10010.

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