Series Math Routines with Kristin Gray: First Grade : Addition Number Talk: First Grade
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
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.
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Number Talks encourage students to think flexibly about the operations and their properties as they solve problems mentally.