简便运算:8.7*9.9 简便运算:4.25*5.24+1.52*2.51 简便运算:(4
答案:1 悬赏:80 手机版
解决时间 2021-11-23 14:28
- 提问者网友:無理詩人
- 2021-11-23 05:39
简便运算:8.7*9.9 简便运算:4.25*5.24+1.52*2.51 简便运算:(4
最佳答案
- 五星知识达人网友:梦中风几里
- 2021-11-23 07:17
解答:8.7*9.9=8.7*(10-0.1)=87-0.87=86.13
4.25*5.24+1.52*2.51=(4+0.25)×(5+0.24)+(1+0.52)×(2+0.51)
=20+0.96+1.25+0.06+(2+0.51+1.04+0.2652)
=22+3.82+0.2652
=26.0852
(4.8*7.5*8.1)/(2.4*2.5*2.7)=(4.8/2.4)*(7.5/2.5)*(8.1/2.7)=2*3*3=18
4.25*5.24+1.52*2.51=(4+0.25)×(5+0.24)+(1+0.52)×(2+0.51)
=20+0.96+1.25+0.06+(2+0.51+1.04+0.2652)
=22+3.82+0.2652
=26.0852
(4.8*7.5*8.1)/(2.4*2.5*2.7)=(4.8/2.4)*(7.5/2.5)*(8.1/2.7)=2*3*3=18
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