27÷（1+2）=9 小红
9×2=18 小明
小明和小红共有27个玻璃球,小明是小红的2倍.问小明和小红各有多少玻璃球?
小明和小红共有27个玻璃球,小明是小红的2倍.问小明和小红各有多少玻璃球?
数学人气：697 ℃时间：2020-03-19 21:29:47
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