 # Add or Subtract 10 or 100

2nd Grade • Half Day Lesson Plan
\$4

## Lesson Plan Description

This half day lesson plan is broken down into 2 separate segments (30-60 minutes each) addressing Numbers in Base-Ten: Adding and Subtracting 10 and 100 (2.NBT.1 & 2.NBT.8). These lessons include: guided and independent practice of concepts, and 3 games to reinforce the concept of adding and subtracting 10 and 100.

• Segment 1: students will find patterns on a number grid and discuss how place value can help find 10 and 100 more or 10 or 100 less than a number without counting, explain their reasoning on how they find 10 or 100 more or 10 or 100 less than a number, and solve equations adding 10 or 100 and subtracting 10 or 100 using mental math.
• Segment 2: students will play the games: “Spin, Add, or Subtract,” “What’s My Number?,” and “Flip and Solve” to practice solving equations adding 10 or 100 and subtracting 10 or 100 using mental math.

These lessons can be taught over the span of a half day or you can use the lessons independently, broken up over several days.