Question

求比值 0.9:0.12 5/7:7/10

Answer 1

求比值
0.9:0.12=90:12=15:2
5/7:7/10=5:10=1:2
3/4:0.6=0.75:0.6=75:60=5:4
化简比
1/4时:15分=25分:15分=5:3
0.5千克:1克=500克:1克=500:1
0.3m:1cm=30cm:1cm=30:1
简便计算
5/6×(7/10+4/5)÷2/5
=5/6×(7/10+4/5)×5/2
=5/6×(7/10×5/2+4/5×5/2)
=5/6×(7/4+2)
=5/6×15/4
=25/8
3/4÷(3/4×5/9)
=3/4÷3/4÷5/9
=1÷5/9
=9/5
=1又4/5
80×(7/16+3/20)
=80×7/16+80×3/20
=5×7+4×3
=35+12
=47