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(八分之三+九分之四)*8*9简便计算 25*九又三十四分之三十三简便计算
人气:336 ℃ 时间:2019-11-04 13:10:50
解答
(八分之三+九分之四)*8*9
=3/8*8*9+4/9*8*9
=27+32
=59
25*九又三十四分之三十三
=25*(10-1/34)
=25*10-25*1/34
=250-25/34
=249又9/34
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