Addition Subtraction Unit Review

To add 153 and 457, a student adds 150 and 450 to get 600.  What is the final step to find the answer correctly?

• Add 3 to 600
• Add 7 to 600
• Add the results of 3+7 to 600
• Add the results of 13+17 to 600

Kylee and Leah represented their school in the city jump roping contest. Kylee jumped 279 times and Leah jumped 395 times.  What is the best estimate of the total number of jumps that Kylee and Leah made for the school?

• 600
• 700
• 800
• 900

Lee is at the fair.   He has 8 ride tickets.  For his last ride, he will need 18 tickets.  If Lee buys 10 more tickets, will he have enough to go on his last ride, and why?

• No, he will need 2 more tickets
• Yes, he has exactly enough tickets
• No, he will be short 1 ticket
• Yes, he will have 3 extra tickets

Chloe was given the problem shown to solve using a hundreds chart.
88-14=?
She started at 88 and moved up 1 row. What should she do next?

• move right 2
• move right 4
• move left 2
• move left 4

Max and Lee were collecting cans for a project. They were asked to complete the chart below
Together they collected 73 cans. Which method could be used to find the number of cans collected by Lee?

• Add 26 and 47
• Add 26 and 73
• Subtract 26 from 73
• Subtract 73 from 26

• Henry
• Nancy
• Roger
• Laura

Ms. Atkins gave Adam 24 buttons and Gavan 18 buttons.  She asked them to create an equation that would show the total number of buttons. Gavan wrote 24+18=42 on his paper.
Which statement explains how Adam can check Gavan's number sentence.

• Subtract 18 from 42 because subtraction is the inverse of addition
• Subtract 18 from 24 because subtraction is the inverse of addition
• add 42 to 18 because the expression is similar to the teacher's number sentence
• Add 42 to 42 because the expression is similar to Gavan's number sentence