-84
21x4=84 plus the negative
To find the amount of cups of fruit used you must multiply the number of smoothies (6) by the amount of fruit need for each smoothie (5/8)
6 x 5/8 = 30/8
30/8 can be simplified to 15/4.
This is still an improper fraction, because the numerator is higher than the denominator. To fix this, you divide 15 by 4, which equals 3 3/4 cups
The answer to your question is:
+4
-4, -3, -2, -1, 0, 1, 2, 3, 4
They are 1, 2 and 3.
Hope that helped ^^
