3.OA.8 Review

Holden had 3 packs of baseball cards with 6 cards in each pack. He gives his friend Clay 4 cards. Which shows one way to find the number of cards Holden has left?

• multiply 2x3 then subtract 6

• multiply 3 by 6 and then subtract 4

• multiply 3 by 6 and then add 4

• multiply 2 by 3 and then add 6

Craig buys 20 tickets at the fair. His friend Todd gives him 5 more. Craig uses 3 tickets on the dunking booth and 4 tickets on the coin toss. Which of these shows a way to find the number of tickets Craig has left?

• add 20 and 5 and then subtract 3

• add 20 and 5 and then subtract 7

• add 3 and 4 and then subtract from 20

• add 5, 4, and 3 and then subtract from 20

Ms. Pang had a jar with 55 paper clips on her desk. Sophie borrowed 7 paper clips and Terrell borrowed 12 paper clips. How many paper clips are left in Ms. Pang’s jar?

• 36
• 42
• 25
• 18

Ms. Alton teaches 19 students. Of those students, 2 were absent and 6 went to the library. Which expression BEST shows how many students are now in the classroom?

• 19-2-6

• 19+2-6

• 19+2+6

• 19x2-6

Jerome delivers mail during the day. He began the day with 326 letters to deliver. He delivered 183 letters in the morning. Over lunch, he picked up 65 more letters to deliver. 

How many letters does Jerome have to deliver after lunch?

• 300
• 177
• 208
• 245

Ruth has $40 to spend at a local amusement park. She purchased 8 ride tickets for $3 each. She plans to spend the rest of her money on food. 

How much money will Ruth have to spend on food?

• $12
• $20
• $16
• $25

Ms. Gerry is purchasing supplies for her classroom. She has 15 students and needs 3 glue sticks and 2 pencils for each student.

How many glue sticks and pencils will she need to purchase altogether?

• Ms. Gerry will need to purchase 30 glue sticks and 45 pencils altogether.
• Ms. Gerry will need to purchase 60 glue sticks and 45 pencils altogether.
• Ms. Gerry will need to purchase 45 glue sticks and 60 pencils altogether.
• Ms. Gerry will need to purchase 45 glue sticks and 30 pencils altogether.

Liam has 36 markers. He gives 12 to his sister and 6 to his brother. 

How many markers does Liam have left?

• Liam has 36 - 18 = 18 markers left.
• Liam has 36 + 12 = 48 markers left.
• Liam has 36 - 6 = 30 markers left.
• Liam has 36 - 12 = 24 markers left.

Melinda scored 100 points on her first math test, 95 points on her second math test, and 98 points on her third math test. Melinda wanted to have a total of 400 points by the end of her fourth math test.

How many points will Melinda need on her fourth test to make her goal?

• 102
• 107
• 115
• 90

Hanna has $50 to buy 8 keychains.

If each keychain costs $6, which equation represents the amount of money (m) Hanna will have left?

• $2
• $56
• $8
• $-2