1 single (recording industry)

1 efficiency

1 surname Qu

1 song

1 zero

2 nought

3 zero sign

4 fractional

5 fragmentary

6 odd (of numbers)

7 (placed between two numbers to indicate a smaller quantity followed by a larger one)

8 fraction

9 (in mathematics) remainder (after division)

10 extra

11 to wither and fall

12 to wither

1 (idiom) everything broken and in disorder

1 to break up the whole into pieces (idiom); dealing with things one by one

2 divide and conquer

1 drifting aimlessly all over the place (idiom)

1 to shed tears of gratitude (idiom); moved to tears

1 lit. right and wrong, crooked and straight (idiom); fig. merits and demerits

2 pros and cons