要修一条水渠,已经修了35%,离中点还差48米.已经修了多少米?

问题描述:

要修一条水渠,已经修了35%,离中点还差48米.已经修了多少米?

48÷(50%-35%)×35%
=48÷15%×35%
=320×35%
=112(米)
答:已经修了112米.