Lesson #13- Translating Words into Math

The Secrets of Translating Words into Math Type Problems

Secret 1: Read the problem and Highlight important information.

Secret 2: Define your variables

Secret 3: Setup the equations

Secret 4: Solve showing all of your work.

Secret 5: Check your answer and write a final statement

7) Nancy is 2 years older than Eric. In 5 years, the sum of their ages will be equal to 40. What is the present age of each?

x: Eric’s Agex+2: Nancy’s Age

(x+5) + (x+2+5)

2x+12 = 40

= 40

-12 -12 2x = 28 2 2 x = 14

Eric is 14 & Nancy is 16.

12) Johnny buys 8 oranges and gets 20 cents back in change from a $5 bill. What is the price of an orange?

x: Price of an orange in cents

8x + 20 = 500 -20 -20 8x = 480 8 8 x = 60 cents

An orange costs 60 cents

16) A salesman has a base salary of $175 per week and a commission of $25 per item sold. How many items did he or she sell? Her total salary was $500.

x: price of an item in $

+ 25x 175 = 500 -175 -175 25x = 325

25 25 x = 13 items

He sold 13items.

Homework

Complete Levels III-V

Choose any 5 word problems on pg. 76-78 to complete.