Jessica Corriere & Robert Richards
This PowerPoint is a
sample of the book, 6
Demi has 6 erasers and 9 pencils. There
is a ratio of erasers to pencils. Which of
the answers below is correct?
How to solve,
The problem is asking for the ratio of erasers to pencils. That
can also be written as erasers per pencil or erasers : pencil
or erasers/pencil, or erasers per pencil.
The answer choices show the numbers with the : sign in
between, 6:9 is not one of the choices.
The first number, 6, is smaller than the second number, 9.
All the choices that have the first number as being the larger
than the second number are incorrect.
The only choice that has the first number being smaller than
the second number is choice b, but the numbers are not 6
Both the 6 and the 9 may be divided by 3.
After dividing both 6 and 9 by three you are left with 2 and 3.
Choice b has 2:3 as the answer, that is the correct choice
Common Core Standard 6th Grade
6.RP.1 Understand the concept of a ratio and use ratio language to
describe a ratio relationship between two quantities. For example,
“The ratio of wings to beaks in the bird house at the
zoo was 2:1, because for every 2 wings there was 1 beak.” “For
every vote candidate A received, candidate C received nearly three
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