题目：计算12÷ \frac{5}{2}+12÷ \frac{5}{3} 的结果是( ). 
选项：
bullet: A
text: 12
bullet: B
text: 1
bullet: C
text: \frac{2}{5}
bullet: D
text: \frac{252}{25}
答案：A
解析：除变乘，再提取公因数计算即可. ~~~~12÷ \frac{5}{2}+12÷ \frac{5}{3} =12× \frac{2}{5}+12× \frac{3}{5} =12× (\frac{2}{5}+\frac{3}{5}) =12× 1 =12.