用递等式计算.(写出必要的计算过程,能简便计算的用简便方法计算) 7.9×12.5 25.38-1.43-4.38-4.57 9
答案:1 悬赏:70 手机版
解决时间 2021-03-17 04:28
- 提问者网友:遮云壑
- 2021-03-16 19:52
用递等式计算.(写出必要的计算过程,能简便计算的用简便方法计算) 7.9×12.5 25.38-1.43-4.38-4.57 9
最佳答案
- 五星知识达人网友:行路难
- 2021-03-16 20:01
(1)7.9×12.5, =(8-0.1)×12.5, =8×12.5-1×12.5, =100-12.5, =87.5; (2)25.38-1.43-4.38-4.57, =25.38-4.38-1.43-4.57, =(25.38-4.38)-(1.43-4.57), =21-6, =15; (3)90+10÷0.4×2.5, =90+25×2.5, =90+62.5, =152.5; (4)0.8×0.4×(7.6×1.25)×2.5, =(0.8×1.25)×(0.4×2.5)×7.6, =1×1×7.6, =7.6; (5)2.3×0.48+0.48×8.7-0.12×4, =2.3×0.48+0.48×8.7-0.48, =0.48×(2.3+8.7-1), =0.48×10, =4.8; (6)0.1-0.1×[0.01÷(1-0.9)], =0.1-0.1×[0.01÷0.1], =0.1-0.1×0.1, =0.1-0.01, =0.09. |
我要举报
如以上问答信息为低俗、色情、不良、暴力、侵权、涉及违法等信息,可以点下面链接进行举报!
大家都在看
推荐资讯