Exercise 4 Page 295

When adding or subtracting fractions, they should have the same denominator. In this exercise, we have two fractions with different denominators. (- 7/10) - 2/5Since 10 is a multiple of 5, we can multiply both the numerator and denominator of 25 by 2 to create a common denominator.

(- 7/10)-2/5

ExpandFrac

a/b=a * 2/b * 2

(- 7/10)-2 * 2/5 * 2

Multiply

Multiply

(- 7/10)-4/10

Now that we have a common denominator, we can proceed to simplifying the expression.

(- 7/10)-4/10

MoveNegFracToNum

Put minus sign in numerator

-7/10-4/10

SubFrac

Subtract fractions

-7-4/10

SubTerm

Subtract term

-11/10

MoveNegNumToFrac

Put minus sign in front of fraction

- 11/10

CalcQuot

Calculate quotient

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