solving multiplication and division equations
Post on 04-Jan-2016
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Solving Multiplication and Division Equations. Lesson 2-7. Procedure. Isolate the variable by performing the inverse operation on the number that is attached to the variable. The inverse of multiplication is division. The inverse of division is multiplication. - PowerPoint PPT Presentation
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Solving Multiplication and Division Equations
Lesson 2-7
Procedure
• Isolate the variable by performing the inverse operation on the number that is attached to the variable.
• The inverse of multiplication is division. The inverse of division is multiplication.
• Use the “Golden Rule.” Perform the same operation on the other side of the equal sign.
Example
m ÷ 3 = 10The inverse of division is multiplication. x 3Repeat the operation on the other side.
x 3
m = 30
Check. Use the original equation.m ÷ 3 = 1030 ÷ 3 = 10
10 = 10
Example 2
7b = 105The inverse of multiplying is dividing.
÷ 7 ÷ 7
b =10571
735
5
350
15
Check
7b = 1057(15) = 105
105 = 105
Homework Time
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