下面各题,如何简算就如何算. 45×18 197+46+54 13×25×4 630÷35
答案:2 悬赏:20 手机版
解决时间 2021-11-18 17:47
- 提问者网友:贪了杯
- 2021-11-18 03:16
下面各题,如何简算就如何算. 45×18 197+46+54 13×25×4 630÷35
最佳答案
- 五星知识达人网友:街头电车
- 2021-11-18 04:43
(1)45×18, =45×2×9, =90×9, =810; (2)197+46+54, =197+(46+54), =197+100, =297; (3)13×25×4, =13×(25×4), =13×100, =1300; (4)630÷35, =630÷(7×5), =630÷7÷5, =90÷5, =18. |
全部回答
- 1楼网友:白昼之月
- 2021-11-18 06:06
45×18
=5*9*2*9
=9*9*5*2
=81*10
=810
197+46+54
=197+(46+54)
=197+100
=297
13×25×4
=13*(25*4)
=13*100
=1300
630÷35
=7*90/(7*5)
=7*90/7/5
=90/5
=18
=5*9*2*9
=9*9*5*2
=81*10
=810
197+46+54
=197+(46+54)
=197+100
=297
13×25×4
=13*(25*4)
=13*100
=1300
630÷35
=7*90/(7*5)
=7*90/7/5
=90/5
=18
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