Rules to Adding and Subtracting Decimals

When adding or subtracting with decimals, you -

• Move decimals out

• Shift decimals 3 places over

• Line up the decimals

• Ignore decimals

What is the FIRST step when adding and subtracting decimals?

• Line up the numbers

• Line up the decimal points

• Add or subtract like normal

• Add in placeholders

What is the rule for adding or subtracting decimals?

• Add first

• Line up the decimals first, then fill in with zeros.

• Move the decimal to the right the total amount of numbers after the decimal.

• Subtract

What is the rule for adding and subtracting positive decimals?

• Line up the decimals and then add/subtract normally

• You do not have to worry about placement of the decimal

• Forget the decimal and move it that many spaces at the end

• Drop it down and move it to the right once

When adding or subtracting decimals, you must line up your decimal points.

• TRUE

• FALSE

What is the first step when adding and subtracting decimals?

• Line up the numbers

• Line up the decimals

• Add or subtract like normal

• Add in placeholders

Do you line up the decimals when adding/subtracting

• Yes

• No

• Maybe so

Match the following rules to the correct operation.

• Addition/Subtraction

• move the decimal up

• Multiplication

• Count the amount of numbers behind each decimal and add them up. Use that number to find your decimal place in the answer.

• Division

• Line up the decimals.

When adding and subtracting decimals you......

• line the numbers

• line up the decimals

• line up place values

what is the first step when you add a decimal?

• solve the problem

• see what your dealing with

• line up the decimal

• add