by Kellie B
(Ann Arbor, MI)
Johnny works at a local bakery. In the morning Customer #1 buys 1/2 a pan of brownies. Later, Customer #2 buys 1/4 of the remaining brownies. The brownies cost $10 for a whole tray.
How much did Customer #1 pay for his brownies? ___________
What fraction of a pan did Customer #2 buy? _______________
How much did Customer #2 pay for his brownies? ___________
Solution
Customer #1
Customer #1 bought half or 1/2 of the whole tray.
The tray cost 10. Half of 10 is 5
Another way to do the computation is to do
1/2 × 10 = (1 × 10) / 2 = 10 / 2 = 5
Customer #1 paid 5 dollars for his brownies
Customer #2
Customer 2 bought 1/4 of the remaining brownies.
The remaining brownies is 1/2
Thus, customer #2 bought 1/4 of 1/2
1/4 of 1/2 = 1/4 × 1/2
= (1 × 1) / (4 × 2)
= 1 / 8
Customer #2 bought 1/8 of the brownies
The fraction of a pan Customer #2 bought is 1/8
Customer #2 only bought 1/8 of the brownies.
So just find out what 1/8 of 10 is
1/8 of 10 = 1/8 × 10
1/8 × 10 = ( 1 × 10 ) / 8 = 10 / 8 = 1.25
Customer #2 paid 1.25 dollar for his brownies?
Feb 15, 19 12:12 PM
The cavalieri's principle is a
Basic math formulas
Algebra word problems
New math lessons
Your email is safe with us. We will only use it to inform you about new math lessons.
Recommended
Scientific Notation Quiz
Graphing Slope Quiz
Adding and Subtracting Matrices Quiz
Factoring Trinomials Quiz
Solving Absolute Value Equations Quiz
Order of Operations Quiz
Types of angles quiz
Feb 15, 19 12:12 PM
The cavalieri's principle is a