Adding and Subtracting Decimals with 3-Digit Numbers Quiz

Align the decimal points before performing the operation (correct)

Always add a zero after the decimal point to make the numbers have the same length

Round the decimals to the nearest whole number before adding or subtracting

Ignore the decimal points and perform the operation as if they were whole numbers

Forgetting to carry over when adding

Treating the decimals as whole numbers (correct)

Rounding both numbers to the nearest whole number before performing the operation

Ignoring the position of the decimal point

Always rounding up the decimals to the nearest whole number

Using place value understanding to align the decimals (correct)

Ignoring the decimal points and focusing on the whole numbers

Adding or subtracting the whole numbers first, then dealing with the decimals