来自邓学华的问题
简算:5.01-1.9+4.990.65×6.4-0.65×5.40.4×99+0.41.25×3.2×0.25.
简算:
5.01-1.9+4.990.65×6.4-0.65×5.40.4×99+0.41.25×3.2×0.25.
1回答
2020-04-09 16:15
简算:5.01-1.9+4.990.65×6.4-0.65×5.40.4×99+0.41.25×3.2×0.25.
简算:
5.01-1.9+4.990.65×6.4-0.65×5.40.4×99+0.41.25×3.2×0.25.
(1)5.01-1.9+4.99=5.01+4.99-1.9=10-1.9=8.1;(2)0.65×6.4-0.65×5.4=0.65×(6.4-5.4)=0.65×1=0.65;(3)0.4×99+0.4=0.4×(99+1)=0.4×100=40;(4)1.25×3.2×0.25=1.25×0.8×4×0.25=(1.25×0.8)...