7th Grade Math

Multi-Part

Lesson (^2) Multiplication and Division Equations
PART A BCD
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Multi-Part
Lesson 2
Get ConnectED
GLE 0706.3.7
Use mathematical models
involving linear equations
to analyze real-world
phenomena. GLE 0706.3.8
Use a variety of strategies to
efficiently solve linear
equations and inequalities.
Also addresses GLE 0706.1.4,
GLE 0706.1.8, SPI 0706.3.7.
214 Equations and Inequalities
Solve Multiplication Equations
with Bar Diagrams
MONEY Kumar is saving his money to buy a new DVD player that
costs $63. He is able to tutor 9 hours in a week. How much should he
charge per hour to have enough money by the end of the week?
What do you need to find? how much he should charge
per hour
Draw a bar diagram that represents the money he
needs to earn and the number of hours he is available
to tutor that week.
Write an equation from the bar diagram. Let x represent
the amount he should charge each hour.
9 x = 63
Use the work backward strategy to solve the equation.
Since 9x = 63, x = 63 ÷ 9. So, x = 7.
Check 9 × 7 = 63 
Kumar should charge $7 an hour.
and Apply
BAR DIAGRAM Draw a bar diagram and write an equation for each
situation. Then solve the equation.

1. DANCE CLASS Keyani spent $70 for 4 hours of dance classes. How
   much did she spend per hour of dance class?


2. TEXT MESSAGING The screen on Lin’s cell phone allows for 8 lines
   of text per message. The maximum number of characters for each
   message is 160. How many characters can each line hold?

Main Idea

Write and solve

one-step multiplication

equations using bar

diagrams.

$63

?????????

hour 1 hour 2 hour 3 hour 4 hour 5 hour 6 hour 7 hour 8 hour 9

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