25×(40+8)×125该如何巧算
答案:5 悬赏:40 手机版
解决时间 2021-04-07 18:03
- 提问者网友：爱了却不能说
- 2021-04-07 04:21
25×(40+8)×125该如何巧算
最佳答案
- 五星知识达人网友：从此江山别
- 2021-04-07 05:26
解法一：
25×(40+8)×125
=(1000+200)×125
=1200×125
=1200×500/4
=300×500
=150000
解法二：
25×(40+8)×125
=25×40×125+25×8×125
=1000×125+25×1000
=1000×(125+25)
=1000×150
=150000
25×(40+8)×125
=(1000+200)×125
=1200×125
=1200×500/4
=300×500
=150000
解法二：
25×(40+8)×125
=25×40×125+25×8×125
=1000×125+25×1000
=1000×(125+25)
=1000×150
=150000
全部回答
- 1楼网友：夜风逐马
- 2021-04-07 08:10
=25*48*125=25*6*(8*125）=150*1000=150000
- 2楼网友：梦中风几里
- 2021-04-07 07:29
25×(40+8)×125
=25×40×125+25×8×125
=1000×125+1000×25
=125000+25000
=150000
=25×40×125+25×8×125
=1000×125+1000×25
=125000+25000
=150000
- 3楼网友：春色三分
- 2021-04-07 06:50
25×(40+8)×125
＝(25x40+25x8)x125
=25x40x125+25x8x125
=1000x125+25x1000
=1000x(125+25)
=1000x150
=150000
＝(25x40+25x8)x125
=25x40x125+25x8x125
=1000x125+25x1000
=1000x(125+25)
=1000x150
=150000
- 4楼网友：慢性怪人
- 2021-04-07 06:17
答：这样的题，利用分配律，将 做乘法之后能得到100、1000、……（比较顺眼的两个数)放在一起。
原式=25×40×125+25×125×8
=125000+25000
=150000
原式=25×40×125+25×125×8
=125000+25000
=150000
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