MATH F.1 10 分

將b通分母...............(x2)
a:b:c
a:b=6:14
b:c=14:15
所以a:b:c=6:14:15











;

a:b=3:7, b:c =14:15
a:b=3:7=6:14
therefore a:b:c=6:14:15

a:b=3:7 b:c=14:15
將a:b=3:7倍大兩倍------->6:14
咁就會同b:c=14:15有一個數一樣,咁會易計D
then,a:b:c=6:14:15
that's the ans!!!

a:b =3:7
b:c = 14:15
--------------------------
a:b =6:14
b:c = 14:15
--------------------------
a:b:c=6:14:15

通份母
橫式
a:b = 3:7
= 2(3):2(7)
= 6:14

b:c= 14:15

a:b:c=6:14:15

直式
a b c
3 7
14 15
---------------------------
3(14) 7(14) 7(15)
42 98 105

=6:14:15

2a:2b =6:14
b:c=14:15

a:b:c=6:14:15

a;b =3;7
b;c = 14;15
____________
6:14:15