KS2 Primary Maths Age 13-17 - Calculations: Adding Decimals - Explained

The video tutorial explains how to carefully add decimals, emphasizing the importance of aligning decimal points and ensuring clarity in writing them. It walks through the process of adding 5.87 and 3.123, highlighting the need to make the decimal point stand out to avoid losing marks. The final answer is calculated as 8.993, with a reminder that even if the calculation is correct, missing the decimal point can result in losing a mark.

What is the first step in solving the addition of 5.87 and 3.123?

• Convert the numbers to fractions.

• Align the decimal points of the numbers.

• Round the numbers to the nearest whole number.

• Add the numbers directly without aligning.

Why is it important to align the decimal points when adding decimals?

• To make the addition faster.

• To make the numbers look neat.

• To ensure the correct place value is maintained.

• To avoid using a calculator.

What is the sum of the digits in the hundredths place when adding 5.87 and 3.123?

• 8

• 9

• 10

• 7

What is the final answer when you add 5.87 and 3.123?

• 8.99

• 9.003

• 8.993

• 9.123

What could cause you to lose a mark even if your calculations are correct?

• Using a calculator.

• Writing the answer in a different color.

• Forgetting to write the decimal point.

• Adding an extra zero at the end.