Using a Number Line for Addition and Subtraction

This video tutorial teaches how to add and subtract numbers using a number line. It begins with an introduction to the concept, followed by a review of addition properties, including the commutative property and the effect of zero. The tutorial then covers efficient counting strategies to simplify addition. Several examples demonstrate how to perform addition and subtraction on a number line, including more advanced calculations. By the end, viewers will understand how to use a number line for basic arithmetic operations.

What is the benefit of using a number line for addition?

• It helps visualize the addition process.

• It makes subtraction easier.

• It is faster than using a calculator.

• It is only useful for small numbers.

What happens when you add zero to a number?

• The number increases by one.

• The number remains the same.

• The number doubles.

• The number decreases by one.

Why is it unnecessary to count each object individually when adding?

• Counting individually is more fun.

• It is faster to use a calculator.

• It is more accurate to count each object.

• You can count on from a starting number.

If you start at 6 on a number line and add 3, where do you end up?

• 9

• 11

• 8

• 10

How do you subtract 3 from 9 using a number line?

• Start at 9 and count up to 12.

• Count down 3 from 9.

• Count up 3 from 9.

• Start at 3 and count up to 9.

What is the result of 9 minus 3 on a number line?

• 8

• 5

• 6

• 7

When adding 6 and 12, why is it quicker to start with 12?

• Because 12 is closer to 20.

• Because 6 is an even number.

• Because you only need to count up 6.

• Because 12 is a larger number.

What is the result of 18 minus 6 using a number line?

• 13

• 12

• 11

• 10

What is the final result of adding 6 and 12?

• 19

• 16

• 17

• 18

What is the key takeaway from using a number line for addition and subtraction?

• It is faster than mental math.

• It is only useful for subtraction.

• It helps visualize and simplify the process.

• It is only useful for small numbers.