Thinking With Numbers Orders

Thinking With
Numbers

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Level Two - Addition

Strategies:

Number Sense
Count On
Use Doubles
Make Ten
Mental Math

An example of a "Make Ten " five-minute lesson from above:

Problem:
Ken is working on his race car. He worked 9 hours on Monday and 7 hours on Tuesday. How many hours did he work?

Connections: Highlight a make ten explanation. Have all students try it with:

Ken worked on his race car 4 more hours today than he did yesterday. He worked 8 hours yesterday. How many hours did Ken work today?

Level Two - Subtraction

Strategies:

Number Relationships
Count Back
Count Up
Use Ten
Mental Math

An example of a "Count Back " five-minute lesson from above:

Problem:
Seth put 16 glow-in-the-dark stickers on the ceiling in his bedroom. Eight stickers fell off during the night. How many stickers were left on the ceiling?

Connections: Highlight a count back or doubles explanation. Have all students try it with:

Seth has 21 glow-in-the-dark stickers and Peter has 10. How many more does Peter have?

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