题目内容

11.(1)3.5×0.7+5.5×0.7+0.7                   (2)0.125×32×0.25
(3)21÷0.25÷4                             (4)3.62×26+36.2×4.3+362×0.31.

分析 (1)根据乘法分配律简算即可;
(2)首先把3.2分成8×0.4,然后根据乘法结合律简算即可;
(3)运用除法的运算性质简算;
(4)根据积不变的规律进行数字转化,运用乘法分配律简算.

解答 解:(1)3.5×0.7+5.5×0.7+0.7
=(3.5+5.5+1)×0.7
=10×0.7
=7

(2)0.125×3.2×0.25
=(0.125×8)×(0.4×0.25)
=1×0.1
=0.1

(3)21÷0.25÷4  
=21÷(0.25×4)
=21÷1
=21

(4)3.62×26+36.2×4.3+362×0.31
=3.62×26+3.62×43+3.62×31
=3.62×(26+43+31)
=3.62×100
=362

点评 完成本题要注意分析式中数据,运用合适的简便方法计算.

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