Math in Focus - Fractions (add,subtract, Multiply & Divide)

If the whole number 4 was part of a fraction that was added or subtracted, what do you do to get a common denominator? (i.e. 4 - 3/4)

Change 4 into either 3 4/4 or 16/4. (i.e. 3 4/4 - 3/4 = 3 1/4) or (16/4 - 3/4 = 13/4 = 3 1/4).

If the whole number 4 was part of a fraction that was multiplied or divided, what do you do to get a common denominator? (i.e. 4 x 3/4 and 4 ÷ 3/4)

Change 4 into ⁴/₁ (i.e. 4/1 x 3/4) (4/1 ÷3/4)

What are the steps for subtracting fractions?

Step 1. Make sure the bottom numbers (the denominators) are the same. Step 2. Subtract the top numbers (the numerators). Put the answer over the same denominator. Step 3. Simplify the fraction (if needed).

What are the steps for multiplying fractions? Chapter 3, page 64

Step 1. Simplify the fractions (multiply a numerator and a denominator by a common factor). Step 2. Multiply the numerators. Step 3. Multiply the denominators.

What are the steps for dividing fractions?

Step 1. Turn the second fraction (the one you want to divide by) upside down (this is now a reciprocal). Step 2. Simplify the fraction (multiply a numerator and a denominator by a common factor). Step 3. Multiply the numerators. Step 4. Multiply the denominators .

What are the steps for adding fractions?

Step 1: Make sure the bottom numbers (the denominators) are the same Step 2: Add the top numbers (the numerators), put the answer over the denominator Step 3: Simplify the fraction (if needed)