(1)1125-997 | (8)998+1246 | (16)4+3.2+5+6.8 | (2)12-(1+2) | (9)400÷125÷8 | (17)25×(37×8) | (3)(-)×12 | (10)1×2× (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)17-3-4 | (13)÷2+× | (20)0.125×0.25×32 | (6)22.3-2.45-5.3-4.55 | (14)(++)×72 | (21)4.25-3-(2-1) | (7)187.7×11-187.7 | (15)43×+57.125×-0.5 | (22)2.42÷+4.58×1-4÷3. |
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