用喜欢的方法计算下面各题.6.2×2.1-2.1 5.12+2.54+4.88
答案:1 悬赏:20 手机版
解决时间 2021-01-05 19:30
- 提问者网友:ミ烙印ゝ
- 2021-01-05 03:53
用喜欢的方法计算下面各题.6.2×2.1-2.1 5.12+2.54+4.88
最佳答案
- 五星知识达人网友:罪歌
- 2021-01-05 04:15
(1)6.2×2.1-2.1, =(6.2-1)×2.1, =5.2×2.1, =10.92; (2)5.12+2.54+4.88, =5.12+4.88+2.54, =10+2.54, =12.54; (3)12.5×17.8×0.8, =12.5×0.8×17.8, =10×17.8, =178; (4)9.9×2.5, =(10-0.1)×2.5, =10×2.5-0.1×2.5, =25-0.25, =24.75; (5)9.4×5.8+10.6×5.8, =(9.4+10.6)×5.8, =20×5.8, =116; (6)12.5×0.4×2.5×8, =(12.5×8)×(0.4×2.5), =100×1, =100. |
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