✔ 最佳答案
63 = ? = 14
72 = 32 = ?
Step 1 :
63 = 7 x 9 , ?
72 = 8 x 9 , 32 = 8 x 4
? 應= 7 x 4 = 28
Step 2 :
63 = 7 x 9 , 28 = 7 x 4 , 14 = 7 x 2
72 = 8 x 9 , 32 = 8 x 4 , ?
? 應= 8 x 2 = 16
答案 :
63 = 28 = 14
72 32 16
2010-02-17 22:59:28 補充:
我估你想問分數 :
63/72 = ?/32 = 14/?
先把 63/72 約分 : 7x9 / 8x9 = 7/8
7/8 = ?/32
右方分母 32 是左方分母 8 的四倍 , 所以右方分子?亦是左方分子7的四倍 , ? = 7 x 4 = 28
同理 : 7/8 = 14/?
右方分子是左方分子 7 的2倍 , 所以右方分母 ? 亦是左方分母的兩倍 , ? = 8 x 2 = 16
答案 :
63/72 = 28/32 = 14/16
2010-02-17 23:05:16 補充:
你還可直接去計 ? :
63/72 = ?/32
7/8 = ?/32
32 x 7/8 = ?
? = 28
63/72 = 28/32 = 14/?
7/8 = 14/?
? x 7/8 = 14
? = 14 / (7/8)
? = 14 x 8 / 7
? = 16
答案 :
63/72 = 28/32 = 14/16