问题
解答题
(1)求比值
|
答案
60:42=60÷42=
;10 7
4.8:7.5=(4.8×10)÷(7.5×10)=48÷75═
=48 75
;16 25
:3 8
=9 20
÷3 8
=9 20
;5 6
3.5:8
=2 5
:35 10
=42 5
÷35 10
=42 5
×35 10
=5 42
;5 12
(2)51:68=(51÷17):(68÷17)=3:4;
=(72÷8):(16÷8)=9:2;72 16
0.75:3.75=(0.75×100):(3.75×100)=75:375=1:5;
0.25:
=0.25:0.25=(0.25×100):(0.25×100)=1:1.1 4