What is the difference of 13.9 - 13.70?

2 Answers
Sep 1, 2016

Answer:

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

Answer:

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#