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 Sum / Total Min: 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Max: 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Make Answer Smallest Number Make Answer Second Number
 Fill in the missing number so the two rods on the top add together to equal the rod at the bottom.
Name:
 12 1 13
 1 17 18
 8 6 14
 10 5 15
 6 7 13
 5 11 16
 12 2 14

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Related Resources

The various resources listed below are aligned to the same standard, (1OA08) taken from the CCSM (Common Core Standards For Mathematics) as the Addition and subtraction Worksheet shown above.

Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ - 3, 6 + 6 = _.

Worksheet

Worksheet Generator

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