问题 解答题
用你喜欢的方法计算.
125×(8+0.8)8.72-3.54-2.462.5×0.64×4350-0.6×50 72×102-2×72100.2-5+9.8.
答案

①125×(8+0.8),

=125×8+125×0.8,

=1000+100,

=1100;

②8.72-3.54-2.46,

=8.72-(3.54+2.46),

=8.72-6,

=2.72;

③2.5×0.64×4,

=2.5×4×0.64,

=10×0.64,

=6.4;

④350-0.6×50,

=350-30,

=320;

⑤72×102-2×72,

=72×(102-2),

=72×100,

=7200;

⑥100.2-5+9.8,

=100.2+9.8-5,

=110-5,

=105.

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