脱式计算,能简算的要简算。
|
| (1)原式=200-108+189 =281 |
(2)原式=90-28 =62 |
(3)原式=80×14 =1120 |
| (4)原式=298+102+85 =485 |
(5)原式=436-(37+63) =336 |
(6)原式=250×4×9 =9000 |
| (7)原式=45×18÷90 =810÷90 =9 |
(8)原式=137×(99+1) =13700 |
(9)原式=23×(100+2) =2300+46 =2346 |
关注公众号回复:奥数答案
即可免费获得密码查看答案
