Lesson plan

# 6. Using place value to add a two-digit number to a multiple of ten (A)

teaches Common Core State Standards CCSS.Math.Content.1.NBT.C.4 http://corestandards.org/Math/Content/1/NBT/C/4
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5

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Lesson objective: Students will be able to apply what they know about using place value to add a two-digit number to a multiple of ten.

This lesson provides an opportunity for students to apply their knowledge and understanding of adding a two-digit number to a multiple of ten to a mathematical situation. Students are asked to complete a chart in which various numbers (both total and parts) are missing from a collection of block designs.

Key Concept students will use:

• We can add two-digit numbers by adding tens to tens and ones to ones. (We can add by place.)

Skills students will use:

• Using place value to read, write, and represent numbers (Grade 1, Unit 8)

Students engage in Mathematical Practice 5: Using Appropriate Tools to Add as they choose a way to represent the numbers in the chart. Student may use cubes, numbers, or any other tool or strategy they need.

Key vocabulary: