Understanding Subtraction as Addition

This video tutorial explains how to convert subtraction problems into addition problems to simplify solving them. It provides multiple examples, including cases with negative numbers, and demonstrates the process of changing the subtraction sign to addition and altering the sign of the second number. The video concludes with practice problems for viewers to try on their own.

What is the first step in converting a subtraction problem into an addition problem?

• Add the numbers directly

• Change the sign of the first number

• Change subtraction to addition

• Keep the first number the same

Tags

CCSS.7.NS.A.1B

When converting negative 15 minus negative 2 to an addition problem, what does the expression become?

• Negative 15 plus negative 2

• Negative 15 plus 2

• 15 plus 2

• 15 minus 2

Tags

CCSS.7.NS.A.1C

Why is it helpful to rewrite 25 minus negative 10 as an addition problem?

• It makes the problem more complex

• It simplifies the calculation

• It is unnecessary

• It changes the result

Tags

CCSS.1.OA.B.3

What is the result of 20 minus 5 when rewritten as an addition problem?

• 20 plus 5

• 15 plus 5

• 20 plus negative 5

• 15 minus 5

Tags

CCSS.7.NS.A.1B

How do you rewrite 100 minus negative 50 as an addition problem?

• 50 plus 100

• 50 minus 100

• 100 plus 50

• 100 minus 50

Tags

CCSS.7.NS.A.1C

What is the result of negative 50 minus 20 when rewritten as an addition problem?

• Negative 50 plus 20

• Negative 50 plus negative 20

• 50 plus 20

• 50 minus 20

Tags

CCSS.7.NS.A.1C

How do you convert 50 minus negative 20 into an addition problem?

• 50 plus 20

• Negative 50 minus 20

• 50 minus 20

• Negative 50 plus 20

Tags

CCSS.7.NS.A.1C

What is the result of 100 minus negative 35 when rewritten as an addition problem?

• 100 plus 35

• 100 minus 35

• 35 plus 100

• 35 minus 100

Tags

CCSS.7.NS.A.1B

What does negative 50 minus negative 2 become when rewritten as an addition problem?

• Negative 50 plus 2

• Negative 50 plus negative 2

• 50 plus 2

• 50 minus 2

Tags

CCSS.7.NS.A.1B

What is the result of negative 10 minus 5 when rewritten as an addition problem?

• Negative 10 plus 5

• 10 minus 5

• Negative 10 plus negative 5

• 10 plus 5

Tags

CCSS.7.NS.A.1B