简便计算 26×9.9 79×3.2+21×3.2 1.25×1.6 47.5×99+47.5急急
答案:7 悬赏:80 手机版
解决时间 2021-04-13 02:37
- 提问者网友:沉默菋噵
- 2021-04-12 18:51
简便计算 26×9.9 79×3.2+21×3.2 1.25×1.6 47.5×99+47.5急急
最佳答案
- 五星知识达人网友:山河有幸埋战骨
- 2021-04-12 19:30
26x9.9
=26x(10-0.1)
=260-2.6
=257.4
79x3.2+21x3.2
=3.2x(79+21)
=3.2x100
=320
1.25x1.6
=1.25x8x0.2
=1x0.2
=0.2
47.5x99+47.5
=47.5x(99+1)
=47.5x100
=4750
1.25x8x0.4
=10x0.4
=4追答1.25x8x0.4x25
=(1.25x8)(0.4x25)
=10x10
=100
=26x(10-0.1)
=260-2.6
=257.4
79x3.2+21x3.2
=3.2x(79+21)
=3.2x100
=320
1.25x1.6
=1.25x8x0.2
=1x0.2
=0.2
47.5x99+47.5
=47.5x(99+1)
=47.5x100
=4750
1.25x8x0.4
=10x0.4
=4追答1.25x8x0.4x25
=(1.25x8)(0.4x25)
=10x10
=100
全部回答
- 1楼网友:我住北渡口
- 2021-04-13 01:53
图
- 2楼网友:持酒劝斜阳
- 2021-04-13 01:31
26x9.9=26x(10-0.1)=26x10-26x0.1=260-2.6=257.4
79x3.2+21x3.2=3.2x(79+21)=3.2x100=320
1.25x1.6=1.25x(0.8+0.8)=1.25x0.8+1.25x0.8=1+1=2
47.5x99+47.5=47.5x(99+1)=47.5x100=4750
1.25x25x8x0.4=1.25x8x(25x0.4)=10x10=100
希望采纳,答题不易
79x3.2+21x3.2=3.2x(79+21)=3.2x100=320
1.25x1.6=1.25x(0.8+0.8)=1.25x0.8+1.25x0.8=1+1=2
47.5x99+47.5=47.5x(99+1)=47.5x100=4750
1.25x25x8x0.4=1.25x8x(25x0.4)=10x10=100
希望采纳,答题不易
- 3楼网友:千杯敬自由
- 2021-04-13 00:03
26×(10-0.1)
=26×10-26×0.1
(21+79)×3.2
1.25×(0.8+0.8)
好好听课!
=26×10-26×0.1
(21+79)×3.2
1.25×(0.8+0.8)
好好听课!
- 4楼网友:第幾種人
- 2021-04-12 22:32
26*9.9=26*(10-0.1)=260-2.6=257.4
79*3.2+21*3.2=3.2*(79+21)=3.2*100=320
1.25*1.6=1.25*(2-0.4)=2.5-0.5=2
47.5*99+47.5=47.5*(99+1)=47.5*100=4750
1.25*25*8*0.4=1.25*8*(25*0.4)=10*10=100
79*3.2+21*3.2=3.2*(79+21)=3.2*100=320
1.25*1.6=1.25*(2-0.4)=2.5-0.5=2
47.5*99+47.5=47.5*(99+1)=47.5*100=4750
1.25*25*8*0.4=1.25*8*(25*0.4)=10*10=100
- 5楼网友:未来江山和你
- 2021-04-12 21:16
26×9.9=26*(10-0.1)=260-2.6=257.4
79×3.2+21×3.2=(79+21)*3.2=100*3.2=320
1.25×1.6=1.25*4*0.4=5*0.4=2
47.5×99+47.5=47.5*(99+1)=47.5*100=4750
1.25×25×8×0.4=(1.25*8)*(25*0.4)=10*10=100
79×3.2+21×3.2=(79+21)*3.2=100*3.2=320
1.25×1.6=1.25*4*0.4=5*0.4=2
47.5×99+47.5=47.5*(99+1)=47.5*100=4750
1.25×25×8×0.4=(1.25*8)*(25*0.4)=10*10=100
- 6楼网友:鱼芗
- 2021-04-12 20:57
解:
26×9.9=26*(10-0.1)=260-2.6=257.4
79×3.2+21×3.2=3.2*(79+21)=320
1.25×1.6=1.25*4*0.4=5*0.4=2
47.5×99+47.5=47.5*(99+1)=4750
1.25×25×8×0.4=1.25*8*25*0.4=10*10=100
26×9.9=26*(10-0.1)=260-2.6=257.4
79×3.2+21×3.2=3.2*(79+21)=320
1.25×1.6=1.25*4*0.4=5*0.4=2
47.5×99+47.5=47.5*(99+1)=4750
1.25×25×8×0.4=1.25*8*25*0.4=10*10=100
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