## Set 9: Addition & Subtraction to 20

 Just Doubles Play the Doubles No Counting Allowed 20 Addition Social Skills: The games are all designed to be played with a partner learning to take turns and manage self. Maths Literacy: Students are learning to read and follow instructions. They are learning to respond to texts presented in a variety of formats. Number: 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. Developing Vocabulary: Students should be encouraged to verbalise their thinking as they play the games. 1. Just Doubles: Making a double, focuses students on using knowledge they have instead of counting to recall an unknown fact. 2. Play the Double: Using doubles knowledge the game focuses students on the inverse relationship between addition and subtraction. 3. 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.   4. 20 Addition: Using facts to 10, doubles and 10+ knowledge to build facts to 20.

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