Understanding Subtraction and Addition on a Number Line

The video tutorial explains how to evaluate the expression 3 and 1/2 - X for different values of X, specifically when X equals 5 and -5. It uses number lines to visualize subtraction and addition, emphasizing the concept of adding the opposite when subtracting. The tutorial also covers the idea of negative numbers and how subtracting a negative is equivalent to adding a positive. The video aims to provide multiple perspectives on solving the problem to ensure a comprehensive understanding.

What is the result of evaluating 3 and 1/2 - x when x is 5?

• -1 1/2

• 1 1/2

• 2

• 0

Tags

CCSS.7.NS.A.1B

How can you visualize subtracting a positive number on a number line?

• Stepping to the right

• Stepping to the left

• Jumping down

• Jumping up

Tags

CCSS.7.NS.A.1B

What does adding the opposite of a number mean?

• Dividing by one

• Multiplying by zero

• Adding the number

• Subtracting the number

Tags

CCSS.2.MD.B.6

CCSS.1.NBT.C.4

If you start at 1 on a number line and add 2, where do you end up?

• 3

• 1

• 2

• 4

Tags

CCSS.7.NS.A.1B

What is the result of adding a negative number on a number line?

• Staying in place

• Jumping up

• Moving to the right

• Moving to the left

Tags

CCSS.7.NS.A.1B

How can subtracting a negative number be interpreted?

• As dividing by one

• As adding a positive number

• As subtracting a positive number

• As multiplying by zero

Tags

CCSS.7.NS.A.1C

What is the result of 3 and 1/2 + 5?

• 7

• 8

• 8 1/2

• 9

Tags

CCSS.6.NS.C.7C

When x = -5, what does the expression 3 and 1/2 - x become?

• 3 and 1/2 - 0

• 3 and 1/2 + 0

• 3 and 1/2 + 5

• 3 and 1/2 - 5

Tags

CCSS.7.NS.A.1C

What is the result of evaluating 3 and 1/2 - (-5)?

• -1 1/2

• 3

• 1 1/2

• 8 1/2

Tags

CCSS.7.NS.A.1C

What is the equivalent of subtracting a negative number?

• Multiplying by zero

• Adding a positive number

• Subtracting a positive number

• Adding a negative number

Tags

CCSS.7.NS.A.1C