This medium worksheet focuses on doubles facts like 6+6 and 8+8 along with near-doubles such as 7+8, splitting practice into two parts. Part A gives twelve equations to build automatic recall of these foundational addition facts. Part B introduces six fill-in-the-blank problems where kindergartners must find the missing addend, like 6 plus blank equals 12.
This sheet helps children memorize key doubles while gently introducing the concept of unknown numbers within an equation.
Style:
Addition within 20
Part A: Solve the Addition Problems
Add the numbers. Write the answer on the line.
5
+5
6
+6
7
+7
8
+8
9
+9
10
+10
5
+6
6
+7
7
+8
8
+9
9
+10
4
+5
Part B: Fill in the Missing Number
Write the missing number to complete each number sentence.
1. 6 + 6 = 12
2. 7 + 7 = 14
3. 8 + 8 = 16
4. 10 + 5 = 15
5. 9 + 9 = 18
6. 10 + 10 = 20
Addition within 20
★ Part A: Solve the Addition Problems
Add the numbers. Write the answer on the line.
5
+5
6
+6
7
+7
8
+8
9
+9
10
+10
5
+6
6
+7
7
+8
8
+9
9
+10
4
+5
★ Part B: Fill in the Missing Number
Write the missing number to complete each number sentence.
1) 6 + 6 = 12
2) 7 + 7 = 14
3) 8 + 8 = 16
4) 10 + 5 = 15
5) 9 + 9 = 18
6) 10 + 10 = 20
Ready to Practice?
For Part A, add the numbers. For Part B, write the missing number.
18 Questions
15-20 minutes
Auto-graded
Retry anytime
🏆
Questions Correct
0
Correct
0
Incorrect
0
Skipped
0:00
Time
0%
Score
Review Your Answers
See what you got right, missed, or skipped.