3.82*9.9+0.382 4.5+5.5*0.42 18.9-0.9*20 1.25
答案:4 悬赏:50 手机版
解决时间 2021-01-19 21:26
- 提问者网友：放下
- 2021-01-19 12:33
3.82*9.9+0.382 4.5+5.5*0.42 18.9-0.9*20 1.25
最佳答案
- 五星知识达人网友：duile
- 2021-01-19 12:44
全部回答
- 1楼网友：蓝房子
- 2021-01-19 14:54
- 2楼网友：逐風
- 2021-01-19 14:27
追答
追问最后一个题呢追答一共5个序号12345
- 3楼网友：时间的尘埃
- 2021-01-19 13:03
3.82*9.9+0.382
=3.82×9.9+3.82×0.1
=3.82×(9.9+0.1)
=3.82×10
=38.2
4.5+5.5*0.42
=4.5+5.5×(0.4+0.02)
=4.5+5.5×0.4+5.5×0.02
=4.5+2.2+0.11
=6.81
18.9-0.9*20
=18.9-18
=0.9
1.25*4*25*0.8
=(1.25×0.8)×(4×25)
=1×100
=100
0.56*99+0.56
=0.56×(99+1)
=0.56×100
=56
=3.82×9.9+3.82×0.1
=3.82×(9.9+0.1)
=3.82×10
=38.2
4.5+5.5*0.42
=4.5+5.5×(0.4+0.02)
=4.5+5.5×0.4+5.5×0.02
=4.5+2.2+0.11
=6.81
18.9-0.9*20
=18.9-18
=0.9
1.25*4*25*0.8
=(1.25×0.8)×(4×25)
=1×100
=100
0.56*99+0.56
=0.56×(99+1)
=0.56×100
=56
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