Counting Collections to 100

Grades K-2 / Math / Addition
CCSS: Math.1.NBT.C.4 Math.1.NBT.C.5

Common Core State Standards

Math

Math

1

Grade 1

NBT

Number & Operations in Base Ten

C

Use place value understanding and properties of operations to add and subtract

4

Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.

Download Common Core State Standards (PDF 1.2 MB)

Common Core State Standards

Math

Math

1

Grade 1

NBT

Number & Operations in Base Ten

C

Use place value understanding and properties of operations to add and subtract

5

Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

Download Common Core State Standards (PDF 1.2 MB)
Lesson Objective
Count and add within 100
Length
6 min
Questions to Consider
How does the second part of the lesson build off of the first part?
Ms. Tse says that she has a classroom of kids who love math. What can you learn from Ms. Tse about engaging students?
How does Ms. Tse create opportunities for students to learn from each other?
Common Core Standards
Math.1.NBT.C.4, Math.1.NBT.C.5

Supporting Materials

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  • Counting Collections to 100 Transcript

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