How to add and subtract decamals

Write down the numbers, one under the other, with the decimal points lined up .Put in zeros so the numbers have the same length (see below for why that is OK) Then add, using column addition, remembering to put the decimal point in the answer.

Step-by-step explanation:

Easy  step

Step-by-step explanation:

1. Write down the numbers, one under the other, with the decimal points aligned in the same line

2. If one number is longer than the other add zeros to fill it up.

3. Then do your addition or subtraction method and don't forget to add or subtract with the decimal point

1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2

step-by-step explanation:

i am only able to answer the first part. i am not sure about the second part. sorry