Lesson 5 15 2 Writing Expressions and Equations

Lesson 5. 1/5. 2 – Writing Expressions and Equations Write this TITLE down on your notes!!! 5. 1 /5. 2 Writing Expressions and Equations

Objective - To translate variable expressions. To translate variable equations and use mental math to solve. add subtract multiply divide plus minus times quotient sum difference product increased by decreased by …of. . . total diminished by twice less Box the more than less than backwards words added to subtracted from when you see them

Verbal Phrase = Variable Expression Add 3 and 7 = 3 + 7 The sum of 3 and 7 = 3 + 7 3 increased by 7 = 3 + 7 The total of 3 and 7 = 3 + 7 Don’t forget, box the backwards words 3 more than 7 = 7 + 3 3 added to 7 = 7 + 3

Verbal Phrase = Variable Expression 7 subtract 3 = 7 - 3 The difference of 7 and 3 = 7 - 3 7 decreased by 3 = 7 - 3 7 diminished by 3 = 7 - 3 7 less 3 = 7 - 3 Don’t forget, 7 less than 3 = 3 - 7 box the backwards 7 subtracted from 3 = 3 - 7 words

Translate the following phrases. First, did you 1) Five plus a number minus 3 box the 5+x– 3 backwards 2) 5 less than a number x words? ? ? x-5 3) Eight multiplied by y minus 7 8 y - 7 4) The product of 10 and m decreased by 7 10 m – 7 or (10 m) – 7 5) Four more than the quotient of a number and 3 6) Twice the sum of x and negative five 2(x +( -5))

One more! Twice a number and 7. 2 x+7

An equation is a mathematical statement that uses an equal sign to separate two equal expressions. It helps to think of the equation as a question. 4 + y = 16 Solution: 12 4 plus what number equals 16?

Try this one! Write an algebraic equation for the sentence. Then solve the equation. Seven subtracted from b – 7 = 14 b = 21 Subtracting 7 what bfrom is fourteen. number equals 14?

Homework • Take out a NEW sheet of paper to start your homework. Use proper math guidelines! PW 5. 1 and 5. 2 front side 12) Name Period # Date 12) Remember to write the original problem, then your work, then write your answer