Subtracting Rational Numbers: Fractions

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