Multiplication and Division Expressions
3-10
Linda washes dogs to earn extra money on weekends.
She spends 30 minutes on each dog. If she washes
5 dogs on Saturday, write an expression for the total
number of minutes she spends washing the dogs.
30 5 30 • 5 30 ( 5 )
multiplication expression
multiplication expression
Write an expression for the total number of minutes
Linda spends washing ddogs on Sunday.
30 d 30 • d 30 (d) 30 d
division expression
Algebraic expressions involving
multiplication commonly omit
the multiplication sign.
30 d 30 d
Each of the expressions above can be read as:
30 times d dmultiplied by 30
the product of 30 and d
Linda will spend 280 minutes washing dogs
next weekend. If she spends 20 minutes
per dog, write an expression for the number
of dogs she will wash.
280 20 280
20
Write an expression for the number of dogs
Linda will wash if she spends mminutes
per dog.
division expression
280 m 280
m
Each of the expressions above can be read as:
280 divided by m the quotient of 280 and m
the result of dividing 280 by m
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