计算下面各题,能简算的要简算.(1)(6.8-5.4)×2.75-0.9(2)3.8×5.6+4.4×3.8(3)1.24×8.3+8.3×1.76(4)88×0.25×9.
问题描述:
计算下面各题,能简算的要简算.
(1)(6.8-5.4)×2.75-0.9
(2)3.8×5.6+4.4×3.8
(3)1.24×8.3+8.3×1.76
(4)88×0.25×9.
答
(1)(6.8-5.4)×2.75-0.9,=1.4×2.75-0.9,=3.85-0.9,=2.95;(2)3.8×5.6+4.4×3.8,=3.8×(5.6+4.4),=3.8×10,=38;(3)1.24×8.3+8.3×1.76,=(1.24+1.76)×8.3,=3×8.3,=24.9;(4)88×0.25×9...