把比例式改成等积式.
2:3 = 3:4.5( ) 3/5:1/5 = 3/7:1/7( )
1/2:1/4 = 1/4:1/8( ) 4:6 = 12:18( )
0.25:0.5 = 24:48( ) 3/8 = 9/24( )
1.25/0.25 = 4/0.8( ) 0.4/25 = 1.2/75
人气：409 ℃ 时间：2020-04-02 13:06:57
解答
2:3 = 3:4.5(2*4.5=3*3 ) 3/5:1/5 = 3/7:1/7( 3/5*1/7=1/5*3/7) 1/2:1/4 = 1/4:1/8( 1/2*1/8=1/4*1/4) 4:6 = 12:18( 4*18=6*12) 0.25:0.5 = 24:48( 0.25*48=0.5*24) 3/8 = 9/24( 3*24=8*9) 1.25/0.25 = 4/0.8( 1.25*...
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