怎样简便怎样算. 8.2×99+8.2 4.8×
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解决时间 2021-02-26 23:56
- 提问者网友:轻浮
- 2021-02-26 03:01
怎样简便怎样算. 8.2×99+8.2 4.8×
最佳答案
- 五星知识达人网友:骨子里都是戏
- 2021-02-26 03:57
①8.2×99+8.2, =8.2×(99+1), =8.2×100, =820; ②4.8×0.25, =4×1.2×0.25, =(4×0.25)×1.2, =1×1.2, =1.2; ③0.78×9.9, =0.78×(10-0.1), =0.78×10-0.78×0.1, =7.8-0.078, =7.722; ④8.96×0.32-0.96×0.32, =0.32×(8.96-0.96), =0.32×8, =2.56; ⑤2.6×1.9÷2.6×1.9, =1.9×2.6÷2.6×1.9, =1.9×1.9, =3.61. |
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