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!