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 Follow these steps as shown in the example below: Read the question and look at the "sandwich". Color in the missing rod and write its number to complete the "sandwich". Read the question again and fill in the missing numbers to complete the equation. 1 2 3 4 5 6 7 8 9 10 What do you have to add to 4 to make 7? 7 4  7 4 + 3 = 7

What do you have to add to 7 to make 9? 9 7 9

7 + 2 = 9

What do you have to add to 2 to make 6? 6 2 6

2 + 4 = 6

What do you have to add to 5 to make 8? 8 5 8

5 + 3 = 8

What do you have to add to 6 to make 10? 10 6 10

6 + 4 = 10

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 What do you have to add to 7 to make 9? 9 7 9 7 + 2 = 9 What do you have to add to 1 to make 6? 6 1 6 1 + 5 = 6 What do you have to add to 3 to make 10? 10 3 10 3 + 7 = 10 What do you have to add to 4 to make 8? 8 4 8 4 + 4 = 8 What do you have to add to 5 to make 9? 9 5 9 5 + 4 = 9 What do you have to add to 2 to make 7? 7 2 7 2 + 5 = 7 What do you have to add to 7 to make 8? 8 7 8 7 + 1 = 8 What do you have to add to 8 to make 10? 10 8 10 8 + 2 = 10

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## Related Resources

The various resources listed below are aligned to the same standard, (1OA06) taken from the CCSM (Common Core Standards For Mathematics) as the Addition and subtraction Worksheet shown above.

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).