Subtracting Rational Numbers: Fractions

This video tutorial explains how to subtract rational numbers by converting the subtraction expression into an addition expression using the change opposite strategy. It provides an example of subtracting fractions, demonstrating how to rewrite the expression and find a common denominator. The tutorial also covers adding rational numbers with the same sign and concludes with a summary of the lesson.

What is the first step in changing a subtraction expression into an addition expression?

• Change the subtraction sign to an addition sign

• Change both numbers to their opposites

• Change the minuend to its opposite

• Change the subtrahend to its opposite

In the example given, what is the opposite of 3 and 2/5?

• 5 and 1/3

• -5 and 1/3

• 3 and 2/5

• -3 and 2/5

When adding rational numbers with the same sign, what should you do with their absolute values?

• Divide them

• Add them

• Multiply them

• Subtract them

What is the common denominator used in the example to add 5 and 1/3 and 3 and 2/5?

• 10

• 20

• 15

• 25

What is the final result of the expression -, 5 and 1/3 plus -, 3 and 2/5?

• -8 and 2/5

• 8 and 2/5

• -8 and 11/15

• 8 and 11/15