(2.5×3.9÷1.3):(2.9+5.1)
=7.5:8
=15:16
2.5乘3.9除以1.3的商.所得的积比2.9与5.1的和是多少?
2.5乘3.9除以1.3的商.所得的积比2.9与5.1的和是多少?
数学人气:937 ℃时间:2019-10-19 17:57:36
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