Add Two Numbers with One Decimal Place

In this activity, we'll be practising how to add two numbers with one decimal place.

 

Top Tip - We always start first by adding the hundreds, then the tens, then the units, and finally the decimals.

 

Once we've done that we then add all the answers together.


Let's have a look at an example of how we can write this down...

 

 

 

Question - Can you add the following numbers together?

 

+	3	3	3	.	6
	6	4	5	.	6

 

So, how can we do this?  Remember we start with the hundreds column first.

 

300 + 600 = 900

30 + 40 = 70

3 + 5 = 8

0.6 + 0.6 = 1.2 

900 + 70 + 8 + 1.2 = 979.2

 

 Tip: Laying work out in columns helps stop us from making mistakes when we add.

 

Answer -

+	3	3	3	.	6
	6	4	5	.	6
	9	0	0
		7	0
			8
			1	.	2
	9	7	9	.	2

 

 

Let's get started!