1. Fractions Write a Decimal as a Fraction
Identify the place value of the farthest digit to the right.
Then write all of the digits after the decimal points as the numerator with the place value as the denominator.
Simplify
Adding and Subtracting Fractions
Rewrite in terms of addition
Get a common denominator
Stack the values so the bigger absolute value is on top.
Borrow or turn into improper fractions(if needed)
Add or subtract numerators and keep common denominator
Simplify
Multiplying Fractions
Write whole numbers and mixed numbers as improper fractions
Simplify diagonals if you can
Multiply numerators
Multiply denominators
Simplify
Dividing Fractions
Write whole numbers and mixed numbers as improper fractions
Rewrite in terms of multiplication
(keep the first the same, change ÷ to • , and write the reciprocal of the second)
Simplify diagonals if you can
Multiply numerators
Multiply denominators
Simplify

2. Adding and Subtracting Decimals
Stack the values so the bigger absolute value is on top
Line up decimal points
Add or subtract (using rules of adding and subtracting integers)
Bring the decimal point down.
Multiplying Decimals
Write longer number on top and shorter number on the bottom (decimals don’t need to line up)
Multiply
Count number of digits to the right of the decimals in the factors (#s you multiplied) and place the decimal so that there are the same number of digits to the right in the product (your answer).
Decide if product is negative or positive
Dividing Decimals
Write as a division house problem
Move the decimal so that the outside number is a whole number
Move the decimal in the inside number the same number of places
Divide