Question

分数 $\dfrac{49}{84}$ 化为最简形式后，分子和分母之和是多少？

When the fraction $\dfrac{49}{84}$ is expressed in simplest form, then the sum of the numerator and the denominator will be

$11$

$17$

$19$

$33$

$133$

因为 $49 = 7 \times 7$ ，且 $84 = 7 \times 12$ ，所以分数可约为 $\dfrac{7}{12}$ 。

分子和分母之和为 $7 + 12 = 19$ 。

所以正确答案是 C。

Since $49 = 7 \times 7$ and $84 = 7 \times 12,$ the fraction reduces to $\dfrac{7}{12}.$

The sum of numerator and denominator is $7 + 12 = 19.$

Thus, the correct answer is C .