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Write the answers to the addition questions below (the first one is done for you).  
2 + 3 = 5  1 + 8 = 9  2 + 5 = 7  3 + 6 = 9 
4 + 2 = 6  5 + 3 = 8  6 + 1 = 7  7 + 2 = 9 
8 + 0 = 8  9 + 0 = 9  1 + 8 = 9  2 + 6 = 8 
3 + 4 = 7  4 + 1 = 5  5 + 2 = 7  2 + 7 = 9 
3 + 5 = 8  4 + 5 = 9  1 + 7 = 8  1 + 6 = 7 
5 + 4 = 9  2 + 4 = 6  4 + 3 = 7  1 + 0 = 1 
4
+ 5 9

3
+ 2 5

5
+ 3 8

8
+ 1 9

4
+ 4 8

3
+ 5 8

5
+ 1 6

8
+ 0 8

6
+ 3 9

7
+ 2 9

6
+ 1 7

5
+ 4 9

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Related Resources
The various resources listed below are aligned to the same standard, (1OA07) taken from the CCSM (Common Core Standards For Mathematics) as the Addition and subtraction Worksheet shown above.
Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 – 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.
Worksheet
To 10
 1digit numbers e.g. 6 + 3, 9 – 4
 Numbers to 9 (1 of 3) e.g. 8 – 4 (both horizontal and vertical formats)
 Sums to 9 (2 of 3) e.g. 6 + 3 (both horizontal and vertical addition)
 Numbers to 9 (2 of 3) e.g. 8 – 4 (both horizontal and vertical formats)
 Sums to 9 (3 of 3) e.g. 6 + 3
To 20
 Sums to 12 e.g. 8 + 4
Similar to the above listing, the resources below are aligned to related standards in the Common Core For Mathematics that together support the following learning outcome:
Work with addition and subtraction equations
 Missing Numbers With Adding & Subtracting to 10 #1 e.g. 6 – __ = 4, __ + 3 = 7 (From Worksheet)
 Missing Numbers With Adding & Subtracting to 10 #2 (From Worksheet)
 Missing Numbers With Adding & Subtracting to 20 #1 (From Worksheet)
 Missing Numbers With Adding & Subtracting to 20 #2 e.g. 12 – __ = 7, __ + 9 = 17 (From Worksheet)
 Addition/ Subtraction Worksheet Generator (Cuisenaire Rodlike) (From Worksheet)
 Addition/ Subtraction Worksheet Generator (From Worksheet)