The teacher asked us to work out the reciprocal of this fraction.
Tips
mistakes
Same characters as the countdown word. Read 倒数 it is a verb, to count backwards. With a fourth tone on 数 it is this noun, where 数 means number rather than to count.
usage
School maths vocabulary. Two numbers whose product is one are each other's 倒数, and taking the reciprocal of a fraction simply swaps its 分子 and 分母, the numerator and the denominator.
