Answer:
Those are benchmark fractions that represent fourths. The blue lines on the number line represent eighths. These are some of the most common benchmark fractions used. Other common benchmark fractions are thirds, sixths, and twelfths.
D
Step-by-step explanation:
3,489 + 8,617 + 1,240 – 564 x 6 = 9,962
There are 9,962 books left in the library
Hope so it helps cause it's also in my book