8.2 Addition and Subtraction Equations

Stan spent $18 on giant carrots at the Giant Vegetable Store. He also bought a bag of giant peas, but the bag had no price tag. Stan was charged a total of $23. Which equation can help you find the cost of the peas?

• 18 + 23 = p

• 18 – 23 = p

• 18 + p = 23

• 23 + p = 18

Tags

CCSS.HSA.CED.A.3

Representations

Morgan has 28 pieces of jewelry, 10 of which are necklaces. The rest of the jewelry pieces are bracelets. Which equation can you use to find the number of bracelets, b, she has?

• b = 10 – 28

• b = 28 – 10

• 28 = b – 10

• 10 = b + 28

Tags

CCSS.HSA.CED.A.3

Multi-Step

Joseph bought 5 folders for school that cost $3 each. He also bought a new backpack. If the total cost was $35, how much did the backpack cost?

• $5

• $15

• $20

• $50

Tags

CCSS.7.EE.B.4A

A football team scored 16 points, which was 12 fewer points than their opponents scored. How many points, y, did their opponents score?

• y = 24

• y = 28

• y = 4

• y = 18

Tags

CCSS.6.EE.B.7

Use the strip diagram to write an equation. Then solve.

Kiki had 17 mystery books. She got some more mystery books as a gift. Now she has a total of 21 mystery books. How many books did Kiki receive as a gift?

• 21 = 17 + p

• 21 + 17 = p

• 4

• 38

Tags

CCSS.HSA.CED.A.3

Use the strip diagram to write an equation. Then solve.

Joe scored 45 points. He scored 12 fewer points than Randy. How points did Randy score?

• 45 - 12 = s

• s − 12 = 45

• 57

• 33

Tags

CCSS.HSA.CED.A.3

Use the strip diagram to write an equation. Then solve.

The pet store had some goldfish. Eight goldfish were sold. There are 28 goldfish left. How many goldfish did the pet store have before some were sold?

• 36

• 28 - 8 = f

• f − 8 = 28

• 20

Tags

CCSS.HSA.CED.A.3

Use the strip diagram to write an equation. Then solve.

Joaquin and Erik worked together on a project. Erik worked 13 hours. Together, they worked 22 hours. How many hours did Joaquin work?

• 9

• 34

• 22 + 12 = h

• 22 = 13 + h

Tags

CCSS.HSA.CED.A.3

Nina arranges a bouquet of flowers for herself and for her mother. She uses 9 more daisies in her bouquet than in her mother’s bouquet. Her mother’s bouquet has 15 daisies.

She represents the number of daisies in her bouquet by using the equation d − 9 = 15.

How many daisies does Nina’s bouquet have?

Tags

CCSS.6.EE.B.7

Kierra has 49 pennies in a drawer and some pennies in a jar. She has 81 pennies in all.

She represents the number of pennies by using the equation 49 + j = 81.

How many pennies does Kierra have in the jar?

Tags

CCSS.6.EE.B.7