What is the difference of 13.9 - 13.70?

2 Answers
Sep 1, 2016

Another way of thinking about it. Same thing but in disguise!

0.2

Explanation:

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

So write 13.9" as "13.7 + 0.2

Putting it all together we have

13.7 + 0.2
ul(13.7 + 0.0) - larr" Subtract"
" "0 + 0.2

color(red)("Once you more used used to subtraction it becomes a bit easier")

Sep 2, 2016

They differ by 0.2

Explanation:

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.

color(white)(xxxxl)13.90
color(white)(xxxl)ul(-13.70)
color(white)(xxxxl)ul(00.20) = 0.2