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lesson 26
1 hour

Ones Digits Sum Greater Than 10


Description

Objective: Add a pair of two-digit numbers when the ones digits have a sum greater than 10. (Day 1)

In Lesson 26 and 27, students add tens and ones when the ones digits have a sum greater than 10, such as 19 + 15. Students continue to decompose the second addend, alternating between adding on the ten first and making the next ten, as shown to the right.

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From EngageNY.org of the New York State Education Department. Grade 1 Mathematics Module 4, Topic F, Lesson 26. Available from engageny.org/resource/grade-1-mathematics-module-4-topic-f-lesson-26; accessed 2015-05-29.
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