Grade 1 Mathematics Module 2, Topic D, Lesson 27

students reading

Objective: Solve addition and subtraction problems decomposing and composing teen numbers as 1 ten and some ones.

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Common Core Learning Standards

CCLS State Standard
1.OA.1 Use addition and subtraction within 20 to solve word problems involving situations of adding to,...
1.OA.6 Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use...
1.NBT.2.b The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight...

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