能简算的简算.
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| (1)(125+11)×8 =125×8+11×8 =1000+88 =1088 (2)63×102-63×2 =63×(102-2) =63×100 =6300 (2)25×28 =25×4×7 =100×7 =700 (4)67×67+33×67 =67×(67+33) =67×100 =6700 (5)125×32×25 =125×8×4×25 =(125×8)×(4×25) =1000×100 =100000 (6)99×32 =(100-1)×32 =100×32-32 =3200-32 =3168 (7)(750-690)÷5+88 =60÷5+88 =12+88 =100 (8)[218-(312-210)]×3 =[218-102]×3 =116×3 =348 |
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