Missing Variable
Addition/ Subtraction
3 two-digit addition
Mystery
Add on/Subtract
100

71 - 50 = 

21

100

72 - 54 = 

18

100

15 + 17 + 22 = 

54

100

What is the value of the 3 in 637?

30

100

What is ten more than 42?

52

200

___ + 19 = 62

43

200

13 + 87 =

100

200

31 + 32 + 33=

96

200

Skip count backwards by 10.

87,77,67, _,47,__

57 and 37

200

What is ten more than 34?

44

300

Look at the number sentence.

82 - ___ = 33

What number fits in the blank?

49

300

36 + 39 = 

75

300

Pop has 18 cans, 21 pots, and 30 plates.  How many items doe he have?

69 items

300

What place value do we always start with when adding or subtracting?

The ONES!

300
What is 10 less than 67?

57

400

Carlos scored 19 points in one game and 26 points in his second game.  Pick the correct equation to solve the problem.

A. 19 + __=26

B. 19 + 26 = ___

C. 26 - 19 = ____

B. 19 +26 = ____

400

Robbie has 57 legos.  He gets 27 more.  How many legos does he have now?

84 legos

400

Cora has 21 blue stickers, 34 red stickers, and 17 yellow stickers.  How many stickers does she have in all?

72 stickers

400

Skip count by 5s

34, __, __, ___, ___

44, 54, 64, 74

400

What is 10 more than 40?

50

500

Marcus has 34 magnets.  He gets some more.  Now he has 48 magnets.  How many magnets did he get?

14 more magnets

500

Margo has 63 blocks.  She gives 17 to a friend.  How many does she have left?

46 blocks

500

There are 29 soccer balls, 54 basketballs, and 12 baseballs.  How many balls are there in all?

95 balls

500

In a number bond box, where would the 59 go in this problem?

32 + 27 = 59

A. One of the bottom boxes

B. The top larger box

B. The top larger box 

It is the greatest number in the equation!

500

What is 10 less than 98?

88