What is the difference of 13.9 - 13.70?
Another way of thinking about it. Same thing but in disguise!
We know that 9 can be split (partitioned) into 7+2 so 0.9 = 0.7+0.2
We also know that 13.70 + 0 = 13.70
Putting it all together we have
They differ by
In Maths, the word "DIFFERENCE" implies a subtraction.
It is asking by how much the numbers differ.
We usually take the small one away from the bigger one, which is written on top:
Line up the decimal points under each other and subtract from the right towards the left.