四年级有36人去游泳,共租了7条船,每条船都坐满了.大、小船各租了几条?
解:假设全是小船,则大船有:
(36﹣4×7)÷(6﹣4)
=8÷2
=4(条);
则小船有:7﹣4=3(条).
答:大船有4条,小船有3条.
6____4=30____6 16____4=5____4
3____6=20____2 5____4=4____5
2____8=4____4 6____3=30____12
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