How do you solve word problems involving addition and subtraction of mixed numbers?

In this lesson you will learn how to solve word problems involving addition and subtraction of mixed numbers by creating number lines.

Let’s Review Mixed Numbers Improper Fractions 3 =

A variable is a symbol that holds the place of an unknown number in an equation = ?25 + y = 50 x 5 = 25 letter picture symbol

A Common Misunderstanding Thinking that every number in a word problem is going to be included when creating the equation. What is known? ∙ 3 friends What is unknown? ∙ how much snack mix (s)

25 X Thinking that the unknown variable will always be located to the right of the equal sign in an equation. The equal sign (=) tells us that both sides of an equation have the same value = X X = ?5 x 5 = ? = ?

Core Lesson Carefully read the word problem to find the key information. 1 2 Draw a model to represent the known and unknown values. 3 Use your model to determine the operation and write an equation. There are three simple steps to creating an equation from a word problem.

? hours (h) + =

Core Lesson Find a common denominator and rename all fractions and mixed numbers. 1 2 Perform the necessary calculations. 3 Write the answer in the context of the word problem. Once you have created an equation, there are three simple steps involved in solving it.

= = + h 2 3 Find a common denominator and rename all unlike fractions and mixed numbers

Core Lesson 2 Perform the necessary calculations. 5 3 = = + h

Core Lesson 3 Write the answer in the context of the word problem.

In this lesson you have learned how to solve word problems involving addition and subtraction of mixed numbers by creating number lines.