| (1)1125-997 | (8)998+1246 | (16)4 |
| (2)12 | (9)400÷125÷8 | (17)25×(37×8) |
| (3)( | (10)1 (11)34×(2+ | (18)125×8.8 |
| (4)4.35+4.25+3.65+3.75 | (12)3.4×99+3.4 | (19)17.15-8.47-1.53 |
| (5)17 | (13) | (20)0.125×0.25×32 |
| (6)22.3-2.45-5.3-4.55 | (14)( | (21)4.25-3 |
| (7)187.7×11-187.7 | (15)43 | (22)2.42÷ |