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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

来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/26 02:42:20
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
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*0.8=0.25*4)
0.4/25 = 1.2/75(0.4*75=25*1.2)