8.1×15.8－3.16+1.58×21简便方法
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解决时间 2021-02-14 17:37
- 提问者网友：溺爱和你
- 2021-02-14 08:45
8.1×15.8－3.16+1.58×21简便方法
最佳答案
- 五星知识达人网友：妄饮晩冬酒
- 2021-02-14 09:17
8.1×15.8－3.16+1.58×21
= 81×1.58－3.16+1.58×21
=（81+21）×1.58-3.16
=102×1.58-3.16
=（100+2）×1.58-3.16
=100×1.58+2×1.58-3.16
=158+3.16-3.16
=158
= 81×1.58－3.16+1.58×21
=（81+21）×1.58-3.16
=102×1.58-3.16
=（100+2）×1.58-3.16
=100×1.58+2×1.58-3.16
=158+3.16-3.16
=158
全部回答
- 1楼网友：逃夭
- 2021-02-14 13:55
158
- 2楼网友：等灯
- 2021-02-14 12:46
=1.58×81—1.58×2+1.58×21
=1.58×（81—2+21）
=1.58×100
=158
=1.58×（81—2+21）
=1.58×100
=158
- 3楼网友：想偏头吻你
- 2021-02-14 11:31
8.1x15.8-3.16+1.58x21
=81x1.58-1.58x2+1.58x21
=（81-2+21）x1.58
=100x1.58
=158
=81x1.58-1.58x2+1.58x21
=（81-2+21）x1.58
=100x1.58
=158
- 4楼网友：夜余生
- 2021-02-14 10:15
8.1✘15.8-3.16+1.58✘21
=8.1✘15.8-15.8✘0.2+15.8✘2.1
=15.8✘（8.1-0.2+2.1 ）
=15.8✘10
=158
=8.1✘15.8-15.8✘0.2+15.8✘2.1
=15.8✘（8.1-0.2+2.1 ）
=15.8✘10
=158
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