题目内容
| 0.8×0.94×12.5 | 0.68×99+0.68 |
| 0.48×8.5+0.48×1.5 | 18.6×1.37-18.6×0.37 |
| 18.8×101-18.8 | 1.02×6.5. |
分析:(1)根据乘法交换律进行简算;
(2)根据乘法分配律进行简算;
(3)根据乘法分配律进行简算;
(4)根据乘法分配律进行简算;
(5)根据乘法分配律进行简算;
(6)1.02=1+0.02,然后再根据乘法分配律进行简算.
(2)根据乘法分配律进行简算;
(3)根据乘法分配律进行简算;
(4)根据乘法分配律进行简算;
(5)根据乘法分配律进行简算;
(6)1.02=1+0.02,然后再根据乘法分配律进行简算.
解答:解:(1)0.8×0.94×12.5
=0.8×12.5×0.94
=10×0.94
=9.4;
(2)0.68×99+0.68
=0.68×(99+1)
=0.68×100
=68;
(3)0.48×8.5+0.48×1.5
=0.48×(8.5+1.5)
=0.48×10
=4.8;
(4)18.6×1.37-18.6×0.37
=18.6×(1.37-0.37)
=18.6×1
=18.6;
(5)18.8×101-18.8
=18.8×(101-1)
=18.8×100
=1880;
(6)1.02×6.5
=(1+0.02)×6.5
=1×6.5+0.02×6.5
=6.5+0.13
=6.63.
=0.8×12.5×0.94
=10×0.94
=9.4;
(2)0.68×99+0.68
=0.68×(99+1)
=0.68×100
=68;
(3)0.48×8.5+0.48×1.5
=0.48×(8.5+1.5)
=0.48×10
=4.8;
(4)18.6×1.37-18.6×0.37
=18.6×(1.37-0.37)
=18.6×1
=18.6;
(5)18.8×101-18.8
=18.8×(101-1)
=18.8×100
=1880;
(6)1.02×6.5
=(1+0.02)×6.5
=1×6.5+0.02×6.5
=6.5+0.13
=6.63.
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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