GMAT数学-分数的性质
The Properties of Fractions(分数的性质)
(l) Addition and Subtraction of Fractions(分数的加法和减法):
两个不同分母的分数相加减时，首先把它们变成相同分母的分数(Equivalent Fractions).然后分母不变把分子相加减.在两个分数通分时.取两分数的分母的小公倍数(leastcommon multiple)。
(2) Multiplication and Division of Fractions(分数的乘法和除法):
两个分数相乘时，把分子分母分别相乘.然后再约分.也可先约分再把分子分母相乘;
两个分数相除时，把除数的分子分母交换位置.然后再与被除数相乘。去看看SAT数学题型与应对策略
Time Saver: Just as in multiplication. when you divide fractions. always combine and factor terms within each fraction. where possible. before you actually do the division.
标签:GMAT数学-分数的性质