Vocabulary
What can you use to count back or add up to subtract on?
open number line
Use a hundred chart to solve 78-41.
37
Use an open number line to solve 45-19.
26
Use break apart strategy to solve 84-37.
47
Use compensation strategy to solved 28-19.
9
The answer to a subtraction problem is called...
the difference
Use a hundred chart to solve 99-53.
43
Use an open number line to solve 61-23.
38
Use break apart strategy to solve 91-62.
29
Use compensation strategy to solve 47-31.
16
Math you can do in your head is called...
mental math
Use a hundred chart to solve 75-17.
58
Use an open number line to solve 46-34.
12
Use break apart strategy to solve 75-39.
36
Use compensation strategy to solve 86-67.
19
This is when you break a number into its place value parts.
Break apart strategy
Stella and Eileen traded 19 stickers on Monday and 28 stickers on Tuesday. How many more stickers did they trade on Tuesday than on Monday? Use a hundred chart to solve your equation.
9 stickers
Liam collected 18 seashells, Ace collected 27 seashells, and Robin collected 52 seashells. How many more seashells did Robin collect than Liam? Use an open number line to solve your equation.
34 seashells
Eric and Jayden traded baseball cards every Friday. By the end of the school year, Eric had 79 baseball cards and Jayden had 55 baseball cards. How many more baseball cards did Eric have? Use break apart strategy to solve your equation.
24 baseball cards
Nishanth and Haya decide to raise money for koalas by selling cupcakes. Haya sells 36 cupcakes and Nishanth sells 24 cupcakes. How many more cupcakes does Haya sell than Nishanth? Use compensation strategy to solved your equation.
12 cupcakes
Choose one strategy to explain how to solve 35-22.
Answer will vary.
Jihoo reads 34 pages in two days. He reads 8 of the pages on the second day. How many pages does Jihoo read on the first day? Write an equation and use a hundred chart to solve it.
26 pages
Summer bakes 88 cookies on Saturday. She bakes 24 less cookies on Sunday than she did on Saturday. How many cookies did Summer bake on Sunday? Use an open number line to solve your equation.
64 cookies
Juah and Sophia counted snowflakes outside the window for 2 minutes. Juah counted 66 snowflakes and Sophia counted 43 snowflakes. How many more snowflakes did Juah count than Sophia? Use break apart strategy to solved your equation.
23 snowflakes
Ryan and Sean each plant a garden with many vegetables. After one week, Ryan has 33 carrots in his garden and Sean has 51 potatoes. How many more vegetables does Sean have than Ryan? Use compensation strategy to solve your equation.
18 vegetables