解法如下:
(5-4)÷(7-5)=1÷2=0.5
∴1个乒乓球是0.5元
(4-5×0.5)÷2=1.5÷2=0.75
∴1个羽毛球0.75元
买5个兵乓球和2个羽毛球要付4元,买7个兵乓球和2个羽毛球要付5元,兵乓球和羽毛球各是多少?
买5个兵乓球和2个羽毛球要付4元,买7个兵乓球和2个羽毛球要付5元,兵乓球和羽毛球各是多少?
数学人气:260 ℃时间:2020-01-25 19:07:14
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