7.6*4.8-13.5怎么简便
答案:3 悬赏:60 手机版
解决时间 2021-02-19 14:16
- 提问者网友：星軌
- 2021-02-18 21:50
7.6*4.8-13.5怎么简便
最佳答案
- 五星知识达人网友：持酒劝斜阳
- 2021-02-18 23:03
解：7.6×4.8-13.5
=7.6×(5-0.2)-13.5
=7.6×5-7.6×0.2-13.5
=38-1.52-13.5
=38-1.5-0.02-13.5
=38-(1.5+13.5)-0.02
=38-15-0.02
=22.98
15.4+16.2÷4.5
=15.4+(81/5)÷(9/2)
=15.4+(81/5)×(2/9)
=15.4+18/5
=15.4+3.6
=19
=7.6×(5-0.2)-13.5
=7.6×5-7.6×0.2-13.5
=38-1.52-13.5
=38-1.5-0.02-13.5
=38-(1.5+13.5)-0.02
=38-15-0.02
=22.98
15.4+16.2÷4.5
=15.4+(81/5)÷(9/2)
=15.4+(81/5)×(2/9)
=15.4+18/5
=15.4+3.6
=19
全部回答
- 1楼网友：野味小生
- 2021-02-19 01:31
7.6*4.8-13.5
=(8-0.4)(5-0.2)-13.5
=40-1.6-2+0.08-13.5
=22.98
不懂可追问，望采纳！追问50.4/3.2*2.08怎么简便
=(8-0.4)(5-0.2)-13.5
=40-1.6-2+0.08-13.5
=22.98
不懂可追问，望采纳！追问50.4/3.2*2.08怎么简便
- 2楼网友：一把行者刀
- 2021-02-19 00:27
7.6*4.8-13.5
=7.6*（5-0.2）-13.5
=7.6*5-7.6*0.2-13.5
=38-1.52-13.5
=22.98
15.4+16.2/4.5
=15.4+162/45
=15.4+（135+27）/45
=15.4+135/45+27/45
=15.4+3+3+3/5
=15.4+3+0.6
=19
=7.6*（5-0.2）-13.5
=7.6*5-7.6*0.2-13.5
=38-1.52-13.5
=22.98
15.4+16.2/4.5
=15.4+162/45
=15.4+（135+27）/45
=15.4+135/45+27/45
=15.4+3+3+3/5
=15.4+3+0.6
=19
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