Unit 4, Lesson 5, Grade 1 icon
Unit 4, Lesson 5

Identify 10 more, 10 less, 1 more, and 1 less than a two-digit number.

EngageNY 60 min(s)

In this lesson, students use Rekenrek bracelets, linking cubes, and drawings to find 10 more, 10 less, 1 more, and 1 less than a given number. Then they begin to explain the patterns that they see. For example, "I see that 10 less than 34 is just 1 less ten, so it must be 24." Students represent how the number changed using arrow notation.

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