3.6*31又2/5+43.9*6又2/5简便运算
答案:2 悬赏:60 手机版
解决时间 2021-03-22 23:04
- 提问者网友：不爱我么
- 2021-03-22 17:56
3.6*31又2/5+43.9*6又2/5简便运算
最佳答案
- 五星知识达人网友：煞尾
- 2021-03-22 18:06
3.6×31又2/5+43.9×6又2/5
= 3.6×31+3.6×2/5+43.9×6+43.9×2/5
=（3.6×31+43.9×6）+（3.6×2/5+43.9×2/5）
=（111.6+263.4）+【2/5×（3.6+43.9）】
= 375+2/5×47.5
= 375+19
= 394
= 3.6×31+3.6×2/5+43.9×6+43.9×2/5
=（3.6×31+43.9×6）+（3.6×2/5+43.9×2/5）
=（111.6+263.4）+【2/5×（3.6+43.9）】
= 375+2/5×47.5
= 375+19
= 394
全部回答
- 1楼网友：骨子里都是戏
- 2021-03-22 18:21
3.6*31又2/5 43.9*6又2/5
=3.6*31.4 43.9*6.4
=3.6*31.4 (31.4 12.5)*6.4
=3.6*31.4 31.4*6.4 12.5*6.4
=31.4*(3.6 6.4) 12.5*8*0.8
=31.4*10 100*0.8
=314 80
=394
=3.6*31.4 43.9*6.4
=3.6*31.4 (31.4 12.5)*6.4
=3.6*31.4 31.4*6.4 12.5*6.4
=31.4*(3.6 6.4) 12.5*8*0.8
=31.4*10 100*0.8
=314 80
=394
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