怎样算简便就怎样算.
267-67×387×99+871.27+3.9+0.73+16.115.17-6.8-3.212.75-(6.8+2.75)3.25+1.83-0.25+4.17.
怎样算简便就怎样算.267-67×387×99+871.27+3.9+0.73+16.115.17-6.8-3.212.75-(6.8+2.75)3.25+1.83-
答案:2 悬赏:80 手机版
解决时间 2021-03-24 09:33
- 提问者网友:鐵馬踏冰河
- 2021-03-23 23:08
最佳答案
- 五星知识达人网友:想偏头吻你
- 2019-11-29 01:56
解:(1)267-67×3,
=267-201,
=66;
(2)87×99+87,
=87×(99+1),
=87×100,
=8700;
(3)1.27+3.9+0.73+16.1,
=(1.27+0.73)+(3.9+16.1),
=2+20,
=22;
(4)15.17-6.8-3.2,
=15.17-(6.8+3.2),
=15.17-10,
=5.17;
(5)12.75-(6.8+2.75),
=12.75-6.8-2.75,
=12.75-2.75-6.8,
=10-6.8,
=3.2;
(6)3.25+1.83-0.25+4.17,
=(3.25-0.25)+(1.83+4.17),
=3+6,
=9.解析分析:(1)先算乘法,再算减法;
(2)运用乘法分配律简算;
(3)(6)运用加法结合律简算;
(4)(5)根据减法的性质简算.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.
=267-201,
=66;
(2)87×99+87,
=87×(99+1),
=87×100,
=8700;
(3)1.27+3.9+0.73+16.1,
=(1.27+0.73)+(3.9+16.1),
=2+20,
=22;
(4)15.17-6.8-3.2,
=15.17-(6.8+3.2),
=15.17-10,
=5.17;
(5)12.75-(6.8+2.75),
=12.75-6.8-2.75,
=12.75-2.75-6.8,
=10-6.8,
=3.2;
(6)3.25+1.83-0.25+4.17,
=(3.25-0.25)+(1.83+4.17),
=3+6,
=9.解析分析:(1)先算乘法,再算减法;
(2)运用乘法分配律简算;
(3)(6)运用加法结合律简算;
(4)(5)根据减法的性质简算.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.
全部回答
- 1楼网友:夜余生
- 2020-02-12 16:56
好好学习下
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