Understand place value: ones, tenths, hundredths, thousandths
Read decimals by saying the whole number, then “point,” then each digit after the decimal
Compare decimals by lining up the decimal points
Add decimals by aligning decimal points and adding place by place
Subtract decimals by aligning decimal points and subtracting place by place
Multiply decimals by multiplying as whole numbers, then placing the decimal in the product
Divide decimals by moving the decimal in the divisor and dividend as needed
Convert fractions to decimals by dividing the numerator by the denominator
Convert decimals to fractions by writing the decimal over its place value
Round decimals by checking the digit to the right of the place being rounded
Estimate decimal answers by using nearby whole numbers
Use zeros as placeholders when needed
Check work by reversing the operation when possible