脱式计算。(能简算的要简算)
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| (1)原式=99×(100+1) =9900+99 =9999 | (2)原式=25×(36+4) =25×40 =1000 |
| (3)原式=(78+22)×16 =100×16 =1600 | (4)原式= 45×(10+4)+19.4 = 450+180+19.4 =946.4 |
| (5)原式=15×(83+17) =15×100 =1500 | (6)原式=6.8+12×(10+1) =6.8+120+12 =138.8 |
编辑:chaxungu时间:2026-04-27 13:06:42分类:小学数学题库
脱式计算。(能简算的要简算)
|
| (1)原式=99×(100+1) =9900+99 =9999 | (2)原式=25×(36+4) =25×40 =1000 |
| (3)原式=(78+22)×16 =100×16 =1600 | (4)原式= 45×(10+4)+19.4 = 450+180+19.4 =946.4 |
| (5)原式=15×(83+17) =15×100 =1500 | (6)原式=6.8+12×(10+1) =6.8+120+12 =138.8 |