**Add and Subtract Two Decimal Place Numbers** *KS3 Revision*

## What you need to know

**Things to remember:**

- We can split up our numbers into “whole number” and “decimal parts”, adding and subtracting separately.
- Adding a negative is the same as subtracting.

We can add and subtract decimals in two ways.

**Method 1:** Column addition and subtraction

Just like whole numbers, we can add and subtract decimals, we just need to remember to put in the decimal point.

*What is the value of 2.64+4.38*

When adding using column addition, we do it in the exact same way, carrying 1 when the decimal value goes above 10.

2.64+4.38=7.02

*What is the value of 9.23-2.35*

Remember, when we subtract a bigger number from a smaller number, we “borrow” 1 from the place value to the left.

9.23-2.35=6.88

## Example Questions

**Question 1:** What is the value of 6.23+5.48?

Answer

9.35-3.16=6.19

**Question 2:** What is the value of 9.35-3.16

Answer

9.35-3.16=6.19