1.一根电线长160米,剪去全长的百分之75.还剩多少米?2.一根电线,剪去全长的百分之75,还剩40米.原电线长多少米?
问题描述:
1.一根电线长160米,剪去全长的百分之75.还剩多少米?
2.一根电线,剪去全长的百分之75,还剩40米.原电线长多少米?
答
160 x (1-75%)=40(m)
答
160米
答
1、还剩:160×(1-75%)=40米
2、原来长:40÷(1-75%)=160米