Lately I have been doing a lot of adding and subtracting decimals. I always get messed up with adding numbers to 0, or adding 0 to numbers. I now know that if you add 0 to anything the number stays the same, and if you add a number to 0 then it becomes the number you are adding. Sometimes when you are adding decimals you need to stick an extra 0 in the equation to fill a spot. Now I fully understand what I need to do when I am adding or subtracting decimals.

On page 102, #15

10.022 + 0.11 = x

In this case the numbers don’t match up perfectly so you need to add an extra 0 on the number 0.11   (0.110)

10.022 + 0.110 =  10.132

Real life situation:

I went to the store and I had $20. I wanted 3 candy bars. Each candy bar costed $1.57. If I bought 3 candy bars with $20, how much money would I have left?

20.00 – 4.71 = 15.29