Unit 4, Lesson 24, Grade 1 icon
Unit 4, Lesson 24

Add a pair of two-digit numbers when the ones digits have a sum less than or equal to 10.

EngageNY 60 min(s)

In this lesson, students interchangeably add sets of two-digit numbers, where the ones digits produce a sum less than or equal to 10. For example, when adding 17 + 13, students decompose the 13 into 10 and 3. Then they add 10 to 17, making 27, and add the remaining ones to find 27 + 3 = 30.

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