Matt from Mr J's channel demonstrates how to add decimals by aligning them properly. He uses a placeholder zero to ensure the numbers are aligned to the hundredths place. The video walks through the addition process step-by-step, resulting in the final answer of 23.28. A quick review is provided, and viewers are directed to the description for a more detailed explanation.

What are the two numbers being added in the video?

• 15.3 and 7.98

• 12.5 and 8.7

• 10.3 and 5.98

• 14.2 and 9.8

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

• To make subtraction easier

• To make the numbers look neat

• To ensure accurate addition

• To avoid using a calculator

What is the purpose of using a placeholder zero in decimal addition?

• To make the addition faster

• To align the numbers to the same decimal place

• To make the numbers larger

• To avoid errors in subtraction

What is the sum of 0.8 and 0.9 in the video?

• 1.8

• 1.7

• 1.6

• 1.5

What is the final answer after adding 15.3 and 7.98?

• 22.28

• 23.28

• 25.28

• 24.28