Workbook Detail
Fact Family Add Sub Within 20 Expert — Set 9
Exercise 1
- OperationPair
- add-sub
- Triple
- 3
- 10
- 13
- Mode
- write_all
- Equations
- {"text":"3 + 10 = 13","parts":[3,"+",10,"=",13]}
- {"text":"10 + 3 = 13","parts":[10,"+",3,"=",13]}
- {"text":"13 - 3 = 10","parts":[13,"-",3,"=",10]}
- {"text":"13 - 10 = 3","parts":[13,"-",10,"=",3]}
Exercise 2
- OperationPair
- add-sub
- Triple
- 2
- 6
- 8
- Mode
- write_all
- Equations
- {"text":"2 + 6 = 8","parts":[2,"+",6,"=",8]}
- {"text":"6 + 2 = 8","parts":[6,"+",2,"=",8]}
- {"text":"8 - 2 = 6","parts":[8,"-",2,"=",6]}
- {"text":"8 - 6 = 2","parts":[8,"-",6,"=",2]}
Exercise 3
- OperationPair
- add-sub
- Triple
- 2
- 10
- 12
- Mode
- write_all
- Equations
- {"text":"2 + 10 = 12","parts":[2,"+",10,"=",12]}
- {"text":"10 + 2 = 12","parts":[10,"+",2,"=",12]}
- {"text":"12 - 2 = 10","parts":[12,"-",2,"=",10]}
- {"text":"12 - 10 = 2","parts":[12,"-",10,"=",2]}
Exercise 4
- OperationPair
- add-sub
- Triple
- 5
- 1
- 6
- Mode
- write_all
- Equations
- {"text":"5 + 1 = 6","parts":[5,"+",1,"=",6]}
- {"text":"1 + 5 = 6","parts":[1,"+",5,"=",6]}
- {"text":"6 - 5 = 1","parts":[6,"-",5,"=",1]}
- {"text":"6 - 1 = 5","parts":[6,"-",1,"=",5]}
Exercise 5
- OperationPair
- add-sub
- Triple
- 2
- 4
- 6
- Mode
- write_all
- Equations
- {"text":"2 + 4 = 6","parts":[2,"+",4,"=",6]}
- {"text":"4 + 2 = 6","parts":[4,"+",2,"=",6]}
- {"text":"6 - 2 = 4","parts":[6,"-",2,"=",4]}
- {"text":"6 - 4 = 2","parts":[6,"-",4,"=",2]}
Exercise 6
- OperationPair
- add-sub
- Triple
- 1
- 1
- 2
- Mode
- write_all
- Equations
- {"text":"1 + 1 = 2","parts":[1,"+",1,"=",2]}
- {"text":"2 - 1 = 1","parts":[2,"-",1,"=",1]}
Teaching Notes
Practice fact family add sub within 20 with free printable worksheets. Uniquely generated — reinforce key math skills with every set.
Frequently Asked Questions
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