2.8x7.4 1.6x7.4 2.8的简便方法是什么
答案:1 悬赏:70 手机版
解决时间 2021-03-14 16:59
- 提问者网友:贪了杯
- 2021-03-14 12:29
2.8x7.4 1.6x7.4 2.8的简便方法是什么
最佳答案
- 五星知识达人网友:怙棘
- 2021-03-14 13:02
2.8x7.4 +1.6x7.4 +2.8
=2.8x7.4 +1.6x(8.4-1) +2.8
=2.8x7.4 +1.6x8.4-1.6+2.8
=2.8x7.4 +1.6x2.8*3+1.2
=2.8x7.4 +4.8x2.8+1.2
=2.8(7.4+4.8)+1.2
=(3-0.2)*12.2+1.2
=36.6-2.44+1.2
=36.6-1.24
=35.36
=2.8x7.4 +1.6x(8.4-1) +2.8
=2.8x7.4 +1.6x8.4-1.6+2.8
=2.8x7.4 +1.6x2.8*3+1.2
=2.8x7.4 +4.8x2.8+1.2
=2.8(7.4+4.8)+1.2
=(3-0.2)*12.2+1.2
=36.6-2.44+1.2
=36.6-1.24
=35.36
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