7.02×900×0.6
0.035÷0.7÷0.5
13.6-13.6×0.7
5.62+3.1×0.6+3.38
(25-1.25×5)÷2.5
8.1×0.3+1.8×0.3+0.03.
7.02×900×0.60.035÷0.7÷0.513.6-13.6×0.75.62+3.1×0.6+3.38(25-1.25×5)÷2.58.1×0.3+1.8×0
答案:2 悬赏:70 手机版
解决时间 2021-01-03 04:07
- 提问者网友:人生佛魔见
- 2021-01-02 22:32
最佳答案
- 五星知识达人网友:玩家
- 2021-01-02 23:13
解:7.02×900×0.6,
=6318×0.6,
=3790.8;
0.035÷0.7÷0.5,
=0.035÷(0.7×0.5),
=0.035÷0.035,
=1;
13.6-13.6×0.7,
=13.6×(1-0.7),
=13.6×0.3,
=4.08;
5.62+3.1×0.6+3.38,
=5.62+1.86+3.38,
=5.62+3.38+1.86,
=9+1.86,
=10.86;
(25-1.25×5)÷2.5,
=18.75÷2.5,
=7.5;
8.1×0.3+1.8×0.3+0.03,
=8.1×0.3+1.8×0.3+0.3×0.1,
=0.3×(8.1+1.8+0.1),
=3.解析分析:(1)是同级运算,按照从前向后的顺序进行计算;
(2)根据除法的性质,进行简算;
(3)运用乘法分配律简算;
(4)、(5)按照四则混合运算的运算顺序进行计算;
(6)先把0.03转化为0.3×0.1,再运用乘法分配律简算.点评:此题是考查四则混合运算,要仔细观察算式的特点,灵活运用一些定律进行简便计算.
=6318×0.6,
=3790.8;
0.035÷0.7÷0.5,
=0.035÷(0.7×0.5),
=0.035÷0.035,
=1;
13.6-13.6×0.7,
=13.6×(1-0.7),
=13.6×0.3,
=4.08;
5.62+3.1×0.6+3.38,
=5.62+1.86+3.38,
=5.62+3.38+1.86,
=9+1.86,
=10.86;
(25-1.25×5)÷2.5,
=18.75÷2.5,
=7.5;
8.1×0.3+1.8×0.3+0.03,
=8.1×0.3+1.8×0.3+0.3×0.1,
=0.3×(8.1+1.8+0.1),
=3.解析分析:(1)是同级运算,按照从前向后的顺序进行计算;
(2)根据除法的性质,进行简算;
(3)运用乘法分配律简算;
(4)、(5)按照四则混合运算的运算顺序进行计算;
(6)先把0.03转化为0.3×0.1,再运用乘法分配律简算.点评:此题是考查四则混合运算,要仔细观察算式的特点,灵活运用一些定律进行简便计算.
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- 1楼网友:woshuo
- 2021-01-02 23:42
感谢回答,我学习了
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