Adding and Subtracting Like Fractions. Warm-Up A bread recipe calls for the ingredients below together with small amounts of sugar, oil, yeast, and salt.

Presentación del tema: "Adding and Subtracting Like Fractions. Warm-Up A bread recipe calls for the ingredients below together with small amounts of sugar, oil, yeast, and salt."— Transcripción de la presentación:

1 Adding and Subtracting Like Fractions

2 Warm-Up A bread recipe calls for the ingredients below together with small amounts of sugar, oil, yeast, and salt. Bread 1 1/3 Cups of whole wheat flour 2 1/3 Cups of white flour 1/3 Cup oatmeal 1/3 Cup apricots (diced) 1/3 Cup hazelnuts 1.How many 1/3 cups are there? 2. Can you combine these ingredients in a 4-cup mixing bowl? Explain.

3 Add and Subtract Like Fractions Record in your Math Journal on page L: Fractions that have the same denominators are called like fractions. To add or subtract fractions, add or subtract the numerators and write the result over the denominator. 1 3 47 3 4 Las fracciones que tienen los mismos denominadores son llamadas como fracciones. Para sumar o restar fracciones, añadir o restar los numeradores y escribir el resultado sobre el denominador. + = 555 - = 888

4 Example Problems 5/9 + 7/9

5 Example Problems -5/9 + 1/9

6 Example Problems -1/6 + (-5/6)

7 -4/5 - 3/5

8 -8/9 - 7/9

9 5/7 - (-4/7)

10 A recipe for chocolate cookies calls for 2 ¾ cups of flour. If Alexis has 1 ¼ cups of flour, how much more will she need?

11 Jasmine is 60 ¼ inches tall. Amber is 58 ¾ inches tall. How much taller is Jasmine than Amber?

12 Up Next… Activity 1: Adding and Subtracting Like Fractions