Question

A local petting zoo allows visitors to feed the goats food pellets. The petting zoo starts the month with 525.25 pounds of food pellets. Each week, the workers track the amount of food pellets given out and any food pellet deliveries.

Week 1 = -164 1/2
Week 2 = -189.75
Week 3 = 355 7/8
Week 4 = -200 3/16

How many pounds of food pellets will the petting zoo have left at the end of the month? Write your answer as a mixed number in simplest form.

__ pound(s)

Answer 1

• 326 11/16 pounds

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Add up all the numbers to get the end of month figure.

Convert mixed fractions to sum of whole and fractions, then combine whole numbers and fractions, bringing all to common denominator of 16.

• 525.25 - 164 1/2 - 189.75 + 355 7/8 - 200 3/16 =
• 525 + 1/4 - 164 - 1/2 - 189 - 3/4 + 355 7/8 - 200 3/16 =
• (525 - 164 - 189 + 355 - 200) + (4/16 - 8/16 - 12/16 + 14/16 - 3/16) =
• 327 + (- 5/16) =
• 327 - 5/16 =
• 326 11/16 pounds