Show your work
1. 12 car washes for $100
or
5 car washes for $45
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2. 12 oz. bag of chips for $3.40
or
3 oz. bag for $0.75

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3. 12 oz. bag of chips for $3.40
or
3 oz. bag for $0.75
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4. 20 oz. bottle of soda for $1.80
or
12 oz. bottle for $1.25
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5. A dozen bagels for $7.80
or
a pack of 3 bagels for $2.10

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6. 10 pencils for $2.40
or
32 pencils for $7.00.
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7. Martha sells apples in 5 lb. bags for $3.80,
or
Steve sells apples in 3 lb. bags for $2.25