计算下面各题,怎样简便就怎样计算.
25×13×4
99×36+36
35.1+1.88+0.1288×125720÷16÷5317×15-17×15.
计算下面各题,怎样简便就怎样计算.25×13×499×36+3635.1+1.88+0.1288×125720÷16÷5317×15-17×15.
答案:2 悬赏:20 手机版
解决时间 2021-12-25 12:59
- 提问者网友:夢醒日落
- 2021-12-24 21:29
最佳答案
- 五星知识达人网友:煞尾
- 2021-12-24 22:39
解:(1)25×13×4,
=(25×4)×13,
=100×13,
=1300;
(2)99×36+36,
=(99+1)×36,
=100×36,
=3600;
(3)35.1+1.88+0.12,
=35.11+(1.88+0.12),
=35.11+2,
=37.11;
(4)88×125,
=(80+8)×125,
=80×125+8×125,
=10000+1000,
=11000;
(5)720÷16÷5,
=720÷(16×5),
=720÷80,
=9;
(6)317×15-17×15,
=(317-17)×15,
=300×15,
=4500.解析分析:(1)根据乘法交换律进行计算,
(2)根据乘法分配律计算,
(3)根据加法结合律计算,
(4)根据乘法分配律计算,
(5)根据除法的性质计算,
(6)根据乘法分配律计算.据此解答.点评:本题主要考查了学生在四则运算中灵活运用简便算法的能力.
=(25×4)×13,
=100×13,
=1300;
(2)99×36+36,
=(99+1)×36,
=100×36,
=3600;
(3)35.1+1.88+0.12,
=35.11+(1.88+0.12),
=35.11+2,
=37.11;
(4)88×125,
=(80+8)×125,
=80×125+8×125,
=10000+1000,
=11000;
(5)720÷16÷5,
=720÷(16×5),
=720÷80,
=9;
(6)317×15-17×15,
=(317-17)×15,
=300×15,
=4500.解析分析:(1)根据乘法交换律进行计算,
(2)根据乘法分配律计算,
(3)根据加法结合律计算,
(4)根据乘法分配律计算,
(5)根据除法的性质计算,
(6)根据乘法分配律计算.据此解答.点评:本题主要考查了学生在四则运算中灵活运用简便算法的能力.
全部回答
- 1楼网友:佘樂
- 2021-12-25 00:13
好好学习下
我要举报
如以上问答信息为低俗、色情、不良、暴力、侵权、涉及违法等信息,可以点下面链接进行举报!
大家都在看
推荐资讯