# Lesson 3.6 writing algebraic expressions answers to riddles

Students are then asked to stand behind their chair. After sitting for 30 minutes to finish the test and doing intense evaluation and communication of a method, they need movement to avoid lagging in motivation to work and think. I instruct students to engage in some yoga stretches warrior pose and tree pose. We review how to write products, quotients and exponents using algebraic expressions.

Transcription 1 Student Name: Lesson 13 Verbal Phrases to s Objectives Translate verbal phrases into algebraic expressions Solve word problems by translating sentences into equations 2 Authors: Five years ago, I was half the age I will be in eight years. How old am I now?

In the last two lessons, we discussed variables and a how to solve equations for a given variable. In this lesson, we will apply these processes to solve word problems, like the one posed above. In order to accomplish this, we must determine words and phrases that are commonly used to represent an algebraic expression.

Algebraic expressions are made up of constants and variables connected by arithmetic operations. These operations include addition, subtraction, multiplication and division.

The following are examples of algebraic expressions. So, we need to find out which phrases are used to stand for different operations. Then, we can represent a verbal phrase as an algebraic expression.

First and foremost, it is important to remember that a variable is used to represent an unknown value. In some cases, a phrase or sentence will tell us which variable we should use to represent the unknown value.

However, it is more common for the reader to create the variable using a let statement. Math On the Move Lesson 13 1 4 A let statement is used to help solve a word problem by creating a variable to represent the unknown value in the word problem. Now that we know how to write a let statement, we can write one for the word problem at the beginning of the lesson.

[BINGSNIPMIX-3

We do not know Cousin Jesus age, so we will use a variable to represent this number. The following expressions all imply addition. Let n represent the unknown number.

The Commutative Property of Addition ion states that 6 plus a number and a number plus 6 represent the same values. For example, 10 less than a number means n We write the number 10 second even though it comes first in the phrase. Think Back Five minus a number and a number minus 5 are not equivalent.

There is no Commutative Property for subtraction since 5 7 and 7 5 are not equivalent. Similarly, 5 n and n 5 are not equivalent. Expressions must be translated from English to algebraic form exactly.

It is very important to write the algebraic expression in the correct order. Pay close attention if you see a key word that means subtraction. Try translating the following phrases on your own.

Math On the Move Lesson 13 3 6 1. Underline the key words in each expression, and then write the algebraic expression implied by each phrase below. A number subtracted from 15 b.

A number increased by 1 d. A number decreased by 1 e. The sum of a number and 8 f. This time, let x represent the unknown number. Key Words times multiplied by product twice double Word Expression 4 times a number a number multiplied by 4 the product of 4 and a number twice a number double a number 4x 4x 4x x x triple of triple a number 3x 3 of a number 3 x Math On the Move 4 7 Multiplication is commutative.

However, when writing algebraic expressions, the constant is always written first. We write 4x rather than x 4. Therefore a number multiplied by 4 is written 4x instead of x 4.

As you can see, there are key words in multiplication that are used for specific numbers.We review how to write products, quotients and exponents using algebraic expressions.

This work is from Tokyo Shoseki’s “Mathematics” text, a resource described as the “ the most widely used elementary mathematics textbooks currently used in Japan ”. Reach millions of candidates online or via print - any time, anywhere with Tes Inspire your class Access the world’s best collection of lesson plans and classroom resources made by teachers, for teachers.

However, when writing algebraic expressions, the constant is always written first. We write 4x rather than x 4. Therefore a number multiplied by 4 is written 4x instead of x 4. This is an awesome kinesthetic activity with higher order thinking involved to teach Simplifying Algebraic Expressions.

Find this Pin and more on Algebraic Thinking by Jamie Wall. Activity for teaching Algebra - collecting like terms. ©R a2T0k1 u2Y fKzuxt ZaS jS Wopf Ytfw PaArie t IL PL YC4. J 0 jAal 4l g erbi NgQhBtKse PrEeos KeZrjv He9d v.q N uMEaxdped EwSi3tmh7 iI Rn0fUiZn EiEt Yeb YAhldgePb4rra t B2H.w Worksheet by Kuta Software LLC.

Math explained in easy language, plus puzzles, games, worksheets and an illustrated dictionary. For K kids, teachers and parents.

Seventh grade Lesson Writing Algebraic Expressions