考點(diǎn):運(yùn)算定律與簡便運(yùn)算
專題:運(yùn)算定律及簡算
分析:①根據(jù)乘法交換律及結(jié)合律計(jì)算;
②根據(jù)四則混合運(yùn)算的運(yùn)算順序計(jì)算;
③根據(jù)乘法分配律進(jìn)行計(jì)算;
④根據(jù)四則混合運(yùn)算的運(yùn)算順序計(jì)算;
⑤把101寫成100+1,根據(jù)乘法分配律進(jìn)行計(jì)算;
⑥根據(jù)乘法分配律進(jìn)行計(jì)算.
解答:
解:①0.25×8.5×4
=0.25×4×8.5
=1×8.5
=8.5
②18×0.92-3.93
=16.56-3.93
=12.63
③1.23×9.4+0.77×9.4
=9.4×(1.23+0.77)
=9.4×2
=18.8
④8.2-9.6×0.5
=8.2-4.8
=3.4
⑤0.63×101
=0.63×(100+1)
=0.63×100+0.63×1
=63+0.63
=63.63
⑥3.7×8.3+8.3×6.3
=8.3×(3.7+6.3)
=8.3×10
=83
點(diǎn)評:完成本題要注意分析式中數(shù)據(jù),運(yùn)用合適的簡便方法計(jì)算.