![](https://dzpdbgwih7u1r.cloudfront.net/96a71358-17f5-447f-a0de-a1aa75cb3a94/96a72721-53c5-43ac-ad3f-7ef6ed2116b7/98794b67-dc0f-41ee-88d1-a5c6cc0900fe/w282h400-wcpamgxrq.png)
![](https://dzpdbgwih7u1r.cloudfront.net/96a71358-17f5-447f-a0de-a1aa75cb3a94/96a72721-53c5-43ac-ad3f-7ef6ed2116b7/98794b6a-02f5-4ff0-9d51-df81f25c168f/w400h282-mdpyveiay.png)
![](https://dzpdbgwih7u1r.cloudfront.net/96a71358-17f5-447f-a0de-a1aa75cb3a94/96a72721-53c5-43ac-ad3f-7ef6ed2116b7/98794b6c-8cab-4df7-a32a-46b423e99683/w400h282-zpkpwcbtn.png)
![](https://dzpdbgwih7u1r.cloudfront.net/96a71358-17f5-447f-a0de-a1aa75cb3a94/96a72721-53c5-43ac-ad3f-7ef6ed2116b7/98794b6f-382a-4674-8bd8-3dbc8007d6f2/w400h282-mkivoddch.png)
![](https://dzpdbgwih7u1r.cloudfront.net/96a71358-17f5-447f-a0de-a1aa75cb3a94/96a72721-53c5-43ac-ad3f-7ef6ed2116b7/98794b72-b96d-455a-8844-c8cc2595ff3f/w400h282-vpnaqgofm.png)
Set 09 Addition & Subtraction to 20
$18.75
Recall of addition and subtraction facts come through use and practice. Students use known facts like doubles and teens to strategise unknown facts on the way to instant recall.
- Just Doubles: Making a double, focuses students on using knowledge they have instead of counting to recall an unknown fact.
- Play the Double: Using doubles knowledge the game focuses students on the inverse relationship between addition and subtraction.
- No Counting Allowed: As the title says, no counting, using 10+ or doubles to solve the missing addend. Extending the use of +/- 1 to +/- 2.
- 20 Addition: Using facts to 10, doubles and 10+ knowledge to build facts to 20.