الكسور والأعداد العشرية: جمع الأعداد العشرية

The video tutorial explains how to add decimal numbers by aligning them according to their place values. It demonstrates the process of setting up the numbers, performing the addition step-by-step, and finalizing the solution by placing the decimal point correctly. The example used involves adding 14, 12, and 39, resulting in a final answer of 18.1.

Why is it important to align decimal points when adding decimal numbers?

• To make the calculation faster

• To ensure the correct addition of place values

• To avoid using a calculator

• To make the numbers look neat

What is the first step when adding the numbers 14, 12, and 39?

• Add the numbers without aligning them

• Multiply the numbers together

• Align the numbers by their decimal points

• Subtract the smallest number from the largest

When adding 2 and 9 in the tenths place, what is the result?

• 11

• 9

• 10

• 12

After adding the tenths place, what should be done with the extra value?

• Add it to the next place value

• Ignore it

• Subtract it from the total

• Multiply it by 2

What is the final result of adding 14, 12, and 39?

• 65.1

• 18.1

• 81.0

• 19.8