修一条水渠,原计划每天修0.48千米,30天修完。实际每天多修0.02千米,实际修了多少天?)o7c5O2c6S1v9c4e
算式:提示.O(M/D9a)Q)o7c5O2c6S1v9c4e
答:实际修了,E0m7g(h,]9p-F+l天。)o7c5O2c6S1v9c4e