0.89×0.48+0.89×0.520.25×13.7×0.44.2×1013.6×992.5×32×1.250.125×8856.5×99+56.5(1.2
答案:2 悬赏:20 手机版
解决时间 2021-04-09 10:36
- 提问者网友:你给我的爱
- 2021-04-09 02:08
0.89×0.48+0.89×0.520.25×13.7×0.44.2×1013.6×99 2.5×32×1.25 0.125×8856.5×99+56.5 (1.25-0.125)×845÷0.09÷0.517.8÷(1.78×4)
最佳答案
- 五星知识达人网友:躲不过心动
- 2021-04-09 02:22
解:0.89×4.8+0.89×0.52
=(0.48+0.52)×0.89,
=1×0.89,
=0.89;
0.25×13.7×0.4
=0.25×0.4×13.7,
=0.1×13.7,
=1.37;
4.2×101
=4.2×100+4.2,
=420+4.2,
=424.2;
3.6×99
=3.6×100-3.6,
=360-3.6,
=356.4;
2.5×32×1.25
=(2.5×4)×(1.25×8),
=10×10,
=100;
0.125×88
=0.125×8×11,
=1×11,
=11;
56.5×99+56.5
=(99+1)×56.5,
=100×56.5,
=5650;
(1.25-0.125)×8
=1.25×8-0.125×8,
=10-1,
=9;
45÷0.09÷0.5
=45÷(0.09×0.5),
=1000;
17.8÷(1.78×4)
=17.8÷1.78÷4,
=2.5.解析分析:完成本题要注意分析式中数据,运用合适的方法进行简算.点评:在简算过程中,增添括号或去掉括号时要注意运算符号的改变.
=(0.48+0.52)×0.89,
=1×0.89,
=0.89;
0.25×13.7×0.4
=0.25×0.4×13.7,
=0.1×13.7,
=1.37;
4.2×101
=4.2×100+4.2,
=420+4.2,
=424.2;
3.6×99
=3.6×100-3.6,
=360-3.6,
=356.4;
2.5×32×1.25
=(2.5×4)×(1.25×8),
=10×10,
=100;
0.125×88
=0.125×8×11,
=1×11,
=11;
56.5×99+56.5
=(99+1)×56.5,
=100×56.5,
=5650;
(1.25-0.125)×8
=1.25×8-0.125×8,
=10-1,
=9;
45÷0.09÷0.5
=45÷(0.09×0.5),
=1000;
17.8÷(1.78×4)
=17.8÷1.78÷4,
=2.5.解析分析:完成本题要注意分析式中数据,运用合适的方法进行简算.点评:在简算过程中,增添括号或去掉括号时要注意运算符号的改变.
全部回答
- 1楼网友:拾荒鲤
- 2021-04-09 03:48
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