Math
RULES FOR COMPUTING WITH DECIMALS
Addition: When adding decimals...
Write one number above the other, line up decimal points
Bring decimal point down into answer line
Fill in empty places with a zero
Add numbers as usual
Subtraction: When subtracting decimals…
Write greater number on top line.
Write lesser number below and make sure decimal points are lined up; bring decimal point down into answer line.
Fill in empty places with a zero
Subtract numbers as usual
Multiplication: When multiplying decimals…
Write longer number on top line.
Write shorter number on lower line.
Ignore decimal points and multiply as usual.
Count digits on right side of decimal point in the factors, then move decimal point that many places to the left.
Division: When dividing decimals…
Write numbers in a division “HOUSE”
Move decimal point in the number on the outside over to the right to get rid of the decimal
Move decimal point in the number inside the house the same number of places to the right
Put the decimal up on top of the house
Now divide as usual