68 Addition and Subtraction Concepts
Successful Strategies
Teaching students to identify doubles and near doubles is the
fi rst step in ownership of these facts. Ask students to explain
which two doubles facts “sandwich” the near doubles fact.
Use manipulatives (towers of cubes or stacks of counters)
to model one more and one less. Write out the facts so that
students can see the patterns. As students gain ownership of
doubles and near doubles, we need to encourage them to use
this knowledge with related subtraction facts.doubles, twice as many, add,
addition, facts, sum, near
doubles, one more, one lessMath Words to Use
Questions at Different Levels of Cognitive Demand
Recall: What is 4 + 4?
Comprehension: How would you explain double?
Application: How could you use 6 + 6 to solve 6 + 7?
Analysis: Why is 5 + 5 similar to 10 + 10?
Evaluation: How would you help someone else
solve 7 + 8?
Synthesis: What if you were to invent a new way to
organize the doubles facts?EASYCOMPLEX