# Let's Learn Those Facts

In this unit, students who have previously studied the meanings of addition use the properties of addition to help them learn addition facts and to master the addition tables. The unit is most appropriate for students of grades 1 and 2. The ability to name the sum of two one-digit numbers with speed and accuracy is an important accomplishment. This skill allows students to focus on multistep algorithms and to compute the answers to problems. Addition properties explored in this unit include the order property, the additive identity, and the results of adding by zero. The most effective and efficient way to help students learn addition facts is to help them build an understanding of the operation, encourage them to use the helpful features of the number system, and give them interesting activities that foster retention.

This is a 5 day unit on properties of addition. Each lesson gives an interesting activity that helps students retain the addition facts.

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