Bell Ringers

1
Bell Ringers

• Mark can rake 12 lawns in one day. Give an
  algebraic expression
• that shows how many lawns Mark can rake in y
  days?

12 x y
2. Round 5,685,018 to the nearest ten thousand.
5,690,000
10
3. Complete this statement ten thousands
100,000

• The chart below shows the number of baseball
  cards that Ray, Charles,
• Trevor, and Nate have.
• Ray 93
• Charles 56
• Trevor 7
• Nate y
• Althogether they have 224 cards. How many cards
  does Nate have?

93 56 7 156 224 156 68
2
One More Bell Ringer!
The population of St. Lawrence County changes
year to year due to births and deaths and
movement of people into and out of the area. The
population of St. Lawrence County in 1950 was
almost 100,000. The population increased by
about 15,000 between 1950 and 1980. What was
the approximate population of St. Lawrence County
in 1980?
100,000 15,000 115,000
3
Objective 14
Understand the concept of a fraction and
simplify fractions to lowest terms.
4
FRACTIONS
A ratio is a comparison of 2 numbers. A fraction
is a ratio. It is the number out of the total.
EXAMPLE
4 12
What is the fraction of cards turned over?
4 to 8
or 48
What is the ratio of cards turned over to cards
not flipped over?
3
6
9
Q
You can simplify fractions to better understand
the ratio.
EXAMPLE
4 12
1 3
Divide the numerator and denominator by
the GCF to get the simplest fraction. This
means 1 out of every 3 cards are turned over!
5
FRACTIONS (cont.)
MORE CHALLENGE
10 24
What is the fraction of cards turned over?
10 to 14
or 1014
What is the ratio of cards turned over to cards
not flipped over?
2
4
6
8
10
Q
3
6
9
Q
10 24
What is in simplest form?
5 12
10 24
Divide the numerator and denominator by
the GCF to get the simplest fraction. This
means 5 out of every 12 cards are turned over!
6
Practice
Mrs. Frenchs problems Your problems
1. There are 40 students on a bus. Of these
students, 24 are girls. What fraction of the
students are girls? Simplify to lowest
terms. 2. There are 40 students on a bus. Of
these students, 24 are girls. What fraction of
the students are boys? Simplify to lowest
terms. 3.
1. There are 60 students on a bus. Of these
students, 35 are boys. What fraction of the
students are boys? Simplify to lowest
terms. 2. There are 60 students on a bus. Of
these students, 35 are boys. What fraction of
the students are girls? Simplify to lowest
terms. 3.
What fraction of the grid is shaded? Simplify.
What fraction of the grid is shaded? Simplify.
How many boxes would you shade to show 1/3?
How many boxes would you shade to show 1/4?
7
Practice
Mrs. Frenchs problems Your problems
1. There are 40 students on a bus. Of these
students, 24 are girls. What fraction of the
students are girls? Simplify to lowest
terms. 2. There are 40 students on a bus. Of
these students, 24 are girls. What fraction of
the students are boys? Simplify to lowest
terms. 3.
1. There are 60 students on a bus. Of these
students, 35 are boys. What fraction of the
students are boys? Simplify to lowest
terms. 2. There are 60 students on a bus. Of
these students, 35 are boys. What fraction of
the students are girls? Simplify to lowest
terms. 3.
24/40 3/5
35/60 7/12
25/60 5/12
16/40 2/5
What fraction of the grid is shaded? Simplify.
What fraction of the grid is shaded? Simplify.
6/15 2/5
8/20 2/5
How many boxes would you shade to show 1/3?
How many boxes would you shade to show 1/4?
5
5
8
Closure
Write a fraction that describes each part of the
whole
Pink
6/24 1/4
Yellow
9/24 3/8
Blue
9/24 3/8