题目内容
用简便方法计算. 12.5×32×0.25 |
36.7×10.1 | 3.7×5.4+4.6×3.7. |
分析:(1)32=4×8,然后再根据乘法交换律和结合律进行简算;
(2)10.1=10+0.1,然后再根据乘法分配律进行简算;
(3)根据乘法分配律进行简算.
(2)10.1=10+0.1,然后再根据乘法分配律进行简算;
(3)根据乘法分配律进行简算.
解答:解:(1)12.5×32×0.25
=12.5×(4×8)×0.25
=(12.5×8)×(4×2.5)
=100×10
=1000;
(2)36.7×10.1
=36.7×(10+0.1)
=36.7×10+36.7×0.1
=367+3.67
=370.67;
(3)3.7×5.4+4.6×3.7
=3.7×(5.4+4.6)
=3.7×10
=37.
=12.5×(4×8)×0.25
=(12.5×8)×(4×2.5)
=100×10
=1000;
(2)36.7×10.1
=36.7×(10+0.1)
=36.7×10+36.7×0.1
=367+3.67
=370.67;
(3)3.7×5.4+4.6×3.7
=3.7×(5.4+4.6)
=3.7×10
=37.
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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