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Addition
Subtraction
Measurement
Hard
100
Write three different addition equations for 15.

13+2=15
10+5=15
9+6=15
4+11=15
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100

Write three different subtraction equations with an answer of 6.

9-3=6
10-4=6
12-6=6
16-10=6
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100

Helen has a book that is 6 inches long. She places it next to a piece of paper that is 8 inches long. How long are they put together?

14 inches

100

16-8 is a Half Fact. Give me two other Half Facts.

18-9

20-10

10-5

4-2

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200

Fill in the missing number.

A: 9+8=
B: 9+7=10+?
C: 4+8+2+6=?

A: 17
B: 6
C: 20

200

Fill in the missing number.

A: 18=?+6
B: ?+5=14
C: ?=20-11

A: 12
B: 9
C: 9

200

A ruler is 12 inches long. Gary put a pencil on the ruler and saw that it was 3 inches long. How much longer is the ruler than the pencil?

9 inches

200

Della says the 7+8 is a Doubles Plus One fact. Do you agree with Della?

Yes
300

7+8=?+9

6

300

Find the missing number in the subtraction equation.
A: 17-9=?
B: 15-7=?
C: 12-8=?

A: 6
B: 8
C: 4

300

John's book is 18 centimeters long. The book is 9 centimeters longer than John's pencil. How long is his pencil? Which of the following represents this situation?

A: 18+9=p
B: p+18=9
C: 9-p=18
D: p+9=18

D: p+9=18

300

Josh says that all doubles facts (6+6) have even sums. Do you agree with Josh?

Yes

400

Josie has three eraser buddies lined up. One is 7 cm, one is 11 cm, and the last one is 17 cm. How long are they lined up together.

35 centimeters

400

Write and solve an equation to match this problem: "The coach has 16 tennis balls and 9 ping-pong balls in a bag. How many more tennis balls than ping-pong balls are in the bag?"

16-9=7

9+7=16

400

Sam drew a line that was 48 cm long. Then he decided he wanted a longer line, so he added some more to it. When he finished, his line was 73 cm long. How many centimeters did he add to his line?

73-48=25 cm

400
Explain how you can use a Make Ten fact to solve 9+6. Include the answer to 9+6 in your explanation.

Take 1 from the 6 to get 10+5=15. Take 4 from 9 to get 5+10=15. Or another way.

500

Paul watched an ant walk a 11 mm and then pause, then 36 mm and then turn, 24 mm and then pause, then 28 mm. How far did the ant walk?

11+36+24+28=99mm
500

Ms. Flynn has 215 math and science books in her classroom library. Of the books, 93 of them are math books. How many are science books

215-93=122 science books

500
Sara measured a poster. The first side of the poster was 81 cm long. The second side was 53 cm long. How much longer was the first side than the second side of the poster?

81-53=28 cm

500

Rose read 129 pages last week and 124 pages this week. Amy read 127 pages last week and 109 pages this week. Who read more pages in all during this week and last week? How many more pages?

Rosa read 17 more pages.