怎样简便就怎样计算 31.2×99+31.2 4.6×10
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解决时间 2021-02-01 20:55
- 提问者网友:寂寞撕碎了回忆
- 2021-01-31 20:00
怎样简便就怎样计算 31.2×99+31.2 4.6×10
最佳答案
- 五星知识达人网友:何以畏孤独
- 2021-01-31 20:55
(1)31.2×99+31.2, =(99+1)×31.2, =100×31.2, =3120; (2)4.6×101, =4.6×(100+1), =4.6×100+4.6×1, =460+4.6, =464.6; (3)32.5-7.8-2.2, =32.5-(7.8+2.2), =32.5-10, =22.5; (4)4×0.8×12.5×2.5, =(4×2.5)×(0.8×12.5), =10×10, =100; (5)43.7÷2.5÷0.4, =43.7÷(2.5×0.4), =43.7÷1, =43.7. |
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