## Supporting Lessons

## Addition and Subtracting 10: Worksheets and Answers

Adding and Subtracting Tens: Random Question Generator

## How to Add or Subtract 10

If we choose a number on the number grid and move one place

**down**, we are**adding 10**.For example:

If we begin with **10** and move one place **down** the number grid, we have **added 10**.

**10 + 10 = 20**.

If we begin with **32** and move one place **down** the number grid, we have **added 10**.

**32 + 10 = 42**.

If we choose a number on the number grid and move one place **up**, we are **subtracting 10**.

For example:

If we begin with **50** and move one place **up** the number grid, we have **subtracted 10**.

**50 – 10 = 40**.

If we begin with **94** and move one place **up** the number grid, we have **subtracted 10**.

**94 – 10 = 84**.