Question

列方程解应用题1:修路工人修一段240米的路,前2天修了45.6米,剩下的每天修4.8米,还要几天修完?2:做洋娃娃,原

Answer 1

1.

设还要x天修完

4.8x+45.6=240

4.8x=240-45.6

x=(240-45.6)/4.8

=40.5

答：还要40.5天修完

2.

设现在可以做x个

0.2x=0.8*240

x=0.8*240/0.2

=960

答：现在可以做960个