用简便方法计算。
|
| (1)原式=15.3+4.7+(0.86+0.14) =20+1 =21 | (2)原式=8×(147+53) =8×200 =1600 | |
(3)原式=125×8×2×5 | (4)原式 =25.3-(8.1+10.9) =25.3-19 =6.3 | (5)原式=98×(100-1) =9800-98 =9702 |
编辑:chaxungu时间:2026-04-27 13:19:59分类:小学数学题库
用简便方法计算。
|
| (1)原式=15.3+4.7+(0.86+0.14) =20+1 =21 | (2)原式=8×(147+53) =8×200 =1600 | |
(3)原式=125×8×2×5 | (4)原式 =25.3-(8.1+10.9) =25.3-19 =6.3 | (5)原式=98×(100-1) =9800-98 =9702 |