If your child needs math practice, click here.For sample problems, click here. Here are some tips for Unit Cost, which aligns with Hawaii state standards:
Unit Cost
When you are in a supermarket, you see many examples of unit cost.
Example 1: Calculating cost
Solve. 1 pound of grapes costs $3. How much do 9 pounds of grapes cost? Use the unit cost ($3/lb of grapes) to solve. × 9 lb of grapes = × 9 lb = $3 × 9 = $27 At the unit cost of $3/lb of grapes, 9 pounds of grapes cost .
Use the unit cost ($3/lb of grapes) to solve.
Example 2: Calculating number of units
Solve. You have $9. 1 magazine costs $2. How many magazines can you buy? Use the unit cost ($2/magazine) to solve. × $9 = 4.5 magazines Since you cannot buy 0.5 magazines, round to the nearest whole number less than 4.5. So you can only buy 4 magazines with $9 when the unit cost is $2/magazine. The answer is
Use the unit cost ($2/magazine) to solve.
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