3-7 Practice Buddy

A year ago, Maggie's puppy weighed 16 pounds. Now, her puppy weighs 37 pounds more. How much does Maggie's puppy weigh now?

Juan wants to buy 1 medium bag and 1 small bag of rubber bands. Will that give him more rubber bands than a large bag? Explain.

Juan wants to use counters to solve the problem 25 + 45. Do you think Juan's choice of tool is a good one? Why or why not?

• Yes. Juan can use counters to solve 25 + 45.

• No, Juan should use base ten blocks instead to solve 25 + 45.

Dominic has 24 rubber bands.
Seth has 17 rubber bands.
How many rubber bands do they have in total?
Explain how you used the chart to solve the problem.

I started at 24, moved down 1 row to add 1 ten to 24. Then I moved ahead 7. I landed on 41. So, 24 + 17 = ?.

Katy has 15 flowers.
Tom gives her 18 more flowers.
How many flowers does Katy have now?

__ flowers

There are four number tiles in a bag.
Rose picks two numbers. The numbers have a sum of 52.
Which two numbers did Rose pick? Explain how you know.

• 21 and 34; On a hundred chart, I counted on 3 tens from 21 and then 1 one to 52.

• 21 and 26; On a hundred chart, I counted on 3 tens from 21 and then 1 one to 52.

• 34 and 18; On a hundred chart, I counted on 1 ten from 34 and then 8 ones to 52.

Tyra is using 8 crayons for her first design. She is using 3 more crayons for her second design. Billy is using 6 crayons for his second design.
How many fewer crayons is Billy using than Tyra on his second design? Which equations help you solve the problem?

• 17 crayons; 8 + 3 = 11 and 11 + 6 = 17

• 11 crayons; 8 + 6 = 14 and 14 – 3 = 11

• 5 crayons; 8 + 3 = 11 and 11 – 6 = 5

• 11 crayons; 8 – 3 = 5 and 5 + 6 = 11