Missing Addend Problems
Name: _____________________________
Date: _____________________________
Instructions: Find the missing number in each addition equation. Write your answer on the line.
1.
15 + _______ = 23
2.
_______ + 12 = 30
3.
27 + _______ = 45
4.
_______ + 19 = 56
5.
34 + _______ = 50
6.
_______ + 28 = 63
7.
46 + _______ = 72
8.
_______ + 38 = 81
9.
55 + _______ = 90
10.
_______ + 47 = 100
11.
68 + _______ = 95
12.
_______ + 54 = 88
13.
73 + _______ = 110
14.
_______ + 66 = 125
15.
82 + _______ = 140
16.
_______ + 75 = 150
Challenge Problems:
17.
145 + _______ = 200
18.
_______ + 178 = 325
19.
256 + _______ = 400
20.
_______ + 189 = 500