Add & Subtract Decimals

Front

What is the result of subtracting a decimal from a whole number?

Back

To subtract a decimal from a whole number, align the decimal points and perform the subtraction as you would with whole numbers, borrowing if necessary.

Front

How do you add two decimals together?

Back

To add two decimals, align the decimal points and add as you would with whole numbers, placing the decimal point in the sum directly below the aligned decimal points.

Front

What is the importance of aligning decimal points in addition and subtraction?

Back

Aligning decimal points ensures that each digit is in the correct place value, which is crucial for accurate calculations.

Front

What is the result of 215.9 - 71?

Back

144.9

Front

What is the result of 21 + 4.09?

Back

25.09

Front

What is the result of 2 - 0.43?

Back

1.57

Front

What is the result of 94 - 4.8?

Back

89.2

Front

What is the result of 74.902 + 96.25?

Back

171.152

Front

What is a common mistake when adding or subtracting decimals?

Back

A common mistake is not aligning the decimal points, which can lead to incorrect results.

Front

How do you handle borrowing when subtracting decimals?

Back

When borrowing, treat the digits to the left of the decimal as whole numbers, and adjust accordingly to ensure accurate subtraction.