Add and subtract decimals in columns, part 1
Adding and subtracting decimals with column-addition is very easy: just add or subtract like with whole numbers. You just need to line up the two numbers so their decimal points and all other places (ones, tens, tenths, etc.) line up.
So, essentially, decimal addition and subtraction exercises are really exercises in lining up the numbers correctly. :)
In the 2nd part of this lesson we solve a problem with several operations (with decimals) and one word problem.