以下六题用简便计算 0.125乘49乘8 0.67乘3加0.67乘97 4.32减4.32
答案:1 悬赏:50 手机版
解决时间 2021-04-07 14:50
- 提问者网友：斑駁影
- 2021-04-07 09:28
以下六题用简便计算 0.125乘49乘8 0.67乘3加0.67乘97 4.32减4.32
最佳答案
- 五星知识达人网友：孤独入客枕
- 2021-04-07 10:38
0.125×49×8
=(0.125×8)×49
=1×49
=49
0.67×3+0.67×97
=0.67×(3+97)
=0.67×100
=67
4.32-4.32×0.9
=4.32×(1-0.9)
=4.32×.01
=0.432
8.6+1.4×2.6
=8.6+(1+0.4)×2.6
=8.6+1×2.6+0.4×2.6
=8.6+2.6+1.04
=11.2+1.04
=12.24
3.45×102
=3.45×(100+2)
=3.45×100+3.45×2
=345+6.9
=351.9
8.8×1.25
=11×0.8×1.25
=11×1
=11
=(0.125×8)×49
=1×49
=49
0.67×3+0.67×97
=0.67×(3+97)
=0.67×100
=67
4.32-4.32×0.9
=4.32×(1-0.9)
=4.32×.01
=0.432
8.6+1.4×2.6
=8.6+(1+0.4)×2.6
=8.6+1×2.6+0.4×2.6
=8.6+2.6+1.04
=11.2+1.04
=12.24
3.45×102
=3.45×(100+2)
=3.45×100+3.45×2
=345+6.9
=351.9
8.8×1.25
=11×0.8×1.25
=11×1
=11
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