题目内容
16.简算.5.08-0.74-1.26;
4.93×3.7+7.3×4.93-4.93;
$\frac{1}{8}$×($\frac{1}{25}$×4)×25;
4.25×98.
分析 (1)利用减法性质进行简算;
(2)利用乘法分配律进行简算;
(3)利用乘法交换律和结合律进行简算;
(4)利用乘法分配律进行简算即可得解.
解答 解:(1)5.08-0.74-1.26
=5.08-(0.74+1.26)
=5.08-2
=3.08
(2)4.93×3.7+7.3×4.93-4.93
=4.93×(3.7+7.3-1)
=4.93×10
=49.3
(3)$\frac{1}{8}$×($\frac{1}{25}$×4)×25
=($\frac{1}{8}$×4)×($\frac{1}{25}$×25)
=$\frac{1}{2}$×1
=$\frac{1}{2}$
(4)4.25×98
=4.25×(100-2)
=4.25×100-4.25×2
=425-8.5
=416.5
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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