Unit 1 Review

Find the Missing Number

100

19=n+10

n=9

200

n+27=40

13

300

n-15=8

n=23

400

45-n=17

n=28

500

100=36+15+n

n= 49

Balancing Equations

100

2+22 = 10+n

14

200

n+30 = 15+40

n=25

300

14+26 = 19+n

n=21

400

28-n = 12-10

n=26

500

n-78 = 50 + 50

n=178

Double-Digit Addition

100

25+25=n

n=50

200

25+26=n

n=51

300

26+51=n

n=77

400

Hailey has 32 markers. Jenna gives her 15 more. Then, Nico borrows 23. How many markers does Hailey have now?

24 markers.

500

Alex had 100 baseball cards. He gives 12 to Nick. He gives 20 to Zach. Then, he gets a pack of 25 for his Birthday. How many baseball cards does Alex have now?

93 baseball cards.

Subtraction Facts to 20

100

10-4=n

n=6

200

15-7=n

n=8

300

19-8=n

n=11

400

Kate bought a pack of 20 colored pencils at the store. She brought them out to recess and lost 4. How many colored pencils does she have now?

n=16

500

Derek ordered 20 pizzas for a party. 5 were cheese, 5 were everything, and 5 were pepperoni. The rest were pineapple. How many pizzas were pineapple?

n=5

Story Problems

100

Marsha picked 13 flowers to make a bouquet. Helen picked 25 roses to make a bouquet. How many more roses did Helen pick than Marsha?

n=12

200

Chloe bought a carton of eggs. There were twelve in all. 3 eggs had cracks in them! How many eggs did NOT have cracks in them?

n=9

300

Andrew loves to read. On Monday he read for 20 minutes. On Wednesday he read for 30 minutes. On Friday he read for 25 minutes. How many minutes did Andrew read in total?

75 minutes.

400

Julia has 13 shirts, 12 pairs of pants, 10 sweaters, and 15 pairs of shoes. How many items does Julia have in her closet?

50 items in her closet.

500

Isaiah is feeling sick! He used 24 tissues in the morning before school. He used 30 tissues before lunch. he used 25 tissues after lunch. When he got home from school, he used 48 more tissues. How many tissues did Isaiah use in all?

127 tissues in all.