50÷2.5+1.8×4.5简便运算
问题描述:
50÷2.5+1.8×4.5简便运算
50÷2.5+1.8×4.5怎样简便运算?
答
50÷2.5+1.8×4.5
=﹙50×4﹚÷﹙2.5×4﹚+0.9×2×4.5
=200÷10+0.9×9
=20+8.1
=28.1