能简便就怎么简便
答案:1 悬赏:20 手机版
解决时间 2021-02-11 22:21
- 提问者网友：書生途
- 2021-02-11 11:41
能简便就怎么简便
最佳答案
- 五星知识达人网友：野味小生
- 2021-02-11 12:18
（1.9-1.9X0.9）除（3.9-2.9）
=(1.9*1-1.9X0.9)/1
=1.9*(1-0.9)
=0.19
0.25x16x1.25x7.2
=0.25*4*4*1.25*8*0.9
=4*0.9
=3.6
0.28x7.29+2.8x0.271+0.72
=0.28*7.29+0.28*2.71+0.72
=0.28*(7.29+2.91)+0.72
=0.28*10+0.72
=2.8+0.72
=3.52
=(1.9*1-1.9X0.9)/1
=1.9*(1-0.9)
=0.19
0.25x16x1.25x7.2
=0.25*4*4*1.25*8*0.9
=4*0.9
=3.6
0.28x7.29+2.8x0.271+0.72
=0.28*7.29+0.28*2.71+0.72
=0.28*(7.29+2.91)+0.72
=0.28*10+0.72
=2.8+0.72
=3.52
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