Addition and Subtraction Mappings to 20 - #2


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Do the operation shown to the four numbers in each of the boxes below . The first one is done for you.
  add 12  
3 arrowing pointing right 15
5 arrowing pointing right 17
6 arrowing pointing right 18
8 arrowing pointing right 20
  add 11  
3 arrowing pointing right 14
4 arrowing pointing right 15
6 arrowing pointing right 17
8 arrowing pointing right 19
  subtract 9  
18 arrowing pointing right 9
15 arrowing pointing right 6
13 arrowing pointing right 4
11 arrowing pointing right 2
  subtract 8  
16 arrowing pointing right 8
10 arrowing pointing right 2
12 arrowing pointing right 4
14 arrowing pointing right 6
  add 11  
2 arrowing pointing right 13
3 arrowing pointing right 14
6 arrowing pointing right 17
5 arrowing pointing right 16
  subtract 12  
14 arrowing pointing right 2
16 arrowing pointing right 4
17 arrowing pointing right 5
20 arrowing pointing right 8

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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).

Chart

Example/Guidance

Flashcard

Methods to learn addition and subtraction

Game

Build The Answer Games
Target Game

Quiz

Worksheet

Addition and Subtraction Facts

 

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