Add and sutract decimals in columns (two decimal digits) - 4th grade math
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. :).
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In this 2nd part of the lesson about adding & subtracting decimals in columns, we first solve a problem with several operations using the correct order of operations. And lastly we have a word problem to solve (by Mathy my mammoth mascot) which involves Mathy and blueberries!
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See also
Add decimals: mental math — video lesson
Math Mammoth Grade 4 curriculum