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lesson 3
1 hour

Two-Digit Numbers As Tens and Some Ones or All Ones


Description

Objective: Interpret two-digit numbers as either tens and some ones or as all ones.

Lesson 3 allows students to explore two-digit numbers as tens and ones, and as just ones. Students use their fingers to represent “bundled” tens and “unbundled” ones by clasping and unclasping their fingers. For example, students model 34 with 3 students showing their hands clasped to make a ten, and a fourth student showing 4 fingers to represent 4 ones.

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From EngageNY.org of the New York State Education Department. Grade 1 Mathematics Module 4, Topic A, Lesson 3. Available from engageny.org/resource/grade-1-mathematics-module-4-topic-lesson-3; accessed 2015-05-29.
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