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A decimal is any number in our base-ten number system. Specifically, we will use numbers with one or more digits to the right of the decimal point in this unit of lessons. The decimal point separates one place from the tenth place in decimals.
2.
TEKS Math 5.2 B
Number and operations. The student applies
mathematical process standards to represent,
compare, and order positive rational numbers and
understand relationships as related to place value. The
student is expected to compare and order two decimals
to thousandths and represent comparisons using the
symbols >, <, or =.
<1 min
3.
Focus
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4.
Career Exploration
• Veterinarians
• Veterinarians care for the health of animals and
work to protect public health.
• Most veterinarians work in private clinics and
hospitals. Others travel to farms or work in
settings such as laboratories, classrooms, or
zoos.
5.
Compare and Order
• Important words to know
• digit
• value
• place value
• period
6.
Compare and Order
• Comparing Decimals
• Greater Than >
• Less Than <
• Equal To =
7.
Compare and Order
• To compare two numbers, compare the
digits in each place from left to right.
8.
Compare and Order
• Line up the decimals
• Start at the left and compare digits of the same
place value
• 0.40 compared to 0.04
• In the tenths place, the 4 is larger than the 0
• so, 0.40 > 0.04
9.
Compare and Order
More Comparing
• When the first place has the same digit, move to the
next place
• Compare More than Two Numbers
• Use a place value chart
• Line up the decimals
10.
Let’s Practice!
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11.
I do #1
Tammy, Kelley, and Jim are vet techs. On Wednesday,
Tammy worked 7.75 hours. Kelley worked 7.69 hours.
Jim worked 7.075 hours. Who worked the most on
A. Tammy
B. Kelley
C. Jim
D. Both A and C
12.
I do #1 Answer
Tammy, Kelley, and Jim are vet techs. On Wednesday, Tammy
worked 7.75 hours. Kelley worked 7.69 hours. Jim worked
7.075 hours. Who worked the most on Wednesday?
A. Tammy
B. Kelley 7.75
C. Jim 7.69
D. Both A and C 7.075
Since they all have the same number in the ones place, we
move to the tenths place. There we see that the BIGGEST
number is the 7. Therefore, Tammy is the answer, since she
worked 7.75 hours.
13.
I do #2
A veterinarian measured medication for puppies.
Order the decimals from least to greatest.
0.38, 0.4, 0.36
A. 0.38, 0.4, 0.36
B. 0.4, 0.36, 0.38
C. 0.36, 0.4, 0.48
D. 0.36, 0.38, 0.4
14.
I do #2 Answer
A veterinarian measured medication for puppies.
Order the decimals from least to greatest.
0.38, 0.4, 0.36
A. 0.38, 0.4, 0.36 0.38
B. 0.4, 0.36, 0.38
C. 0.36, 0.4, 0.48 0.40
D. 0.36, 0.38, 0.4
0.36
Since they are all the same number in the ones column, we move to
the tenths. The 0.40 is the biggest. When we move to the
hundredths, we see that 6 is smaller than the 8. Therefore, the
answer is D.
15.
We do #1
Dr. Jones, a veterinarian did four surgeries on Friday. The lengths of
the surgeries are below.
Order from least to greatest.
1.25 1.52 1.02 1.50
A. 1.25 1.52 1.02 1.50
B. 1.52 1.02 1.50 1.25
C. 1.02 1.50 1.25 1.52
D. 1.02 1.25 1.50 1.52
16.
We do #1 Answer
Dr. Jones, a veterinarian did four surgeries on Friday. The lengths of
the surgeries are below.
Order from least to greatest.
1.25 1.52 1.02 1.50
A. 1.25 1.52 1.02 1.50
B. 1.52 1.02 1.50 1.25
C. 1.02 1.50 1.25 1.52
D. 1.02 1.25 1.50 1.52
17.
We do #2
Below are the weights of four dogs measured by a vet tech.
Put these decimals in order from least to greatest:
22.65, 23.8, 22, and 23.25
A. 22.65, 22, 23.8, 23.25
B. 22, 22.65, 23.25, 23.8
C. 23.25, 23.8, 22.65, 22
D. 22.65, 22, 23.25, 23.8
18.
We do Answer #2
Below are the weights of four dogs measured by a vet tech.
Put these decimals in order from least to greatest:
22.65, 23.8, 22, and 23.25
A. 22.65, 22, 23.8, 23.25
B. 22, 22.65, 23.25, 23.8
C. 23.25, 23.8, 22.65, 22
D. 22.65, 22, 23.25, 23.8
19.
We do #3
Put these decimals in order from greatest to least:
2.43; 2.34; 2.05; 2.18
A. 2.05; 2.18; 2.34; 2.43
B. 2.18; 2.05; 2.43; 2.34
C. 2.43; 2.34; 2.18; 2.05
D. 2.34, 2.18, 2.05, 2.43
20.
We do #3 Answer
Put these decimals in order from greatest to least:
2.43; 2.34; 2.05; 2.18
A. 2.05; 2.18; 2.34; 2.43
B. 2.18; 2.05; 2.43; 2.34
C. 2.43; 2.34; 2.18; 2.05
D. 2.34, 2.18, 2.05, 2.43
21.
You do #1
Order these numbers from greatest to least:
0.25, 0.89, 0.56, 0.99
A. 0.99, 0.56, 0.89, 0.25
B. 0.25, 0.56, 0.89, 0.99
C. 0.99, 0.89, 0.56, 0.25
D. 0.89, 0.56, 0.25, 0.99
22.
You do #1
Order these numbers from greatest to least:
0.25, 0.89, 0.56, 0.99
A. 0.99, 0.56, 0.89, 0.25
B. 0.25, 0.56, 0.89, 0.99
C. 0.99, 0.89, 0.56, 0.25
D. 0.89, 0.56, 0.25, 0.99
23.
You do #2
Emily bought the following amounts of treats for
animals at the vet clinic.
2.0 pounds of dog treats
0.75 pounds of cat treats
0.5 pounds of rabbit treats
1.25 pounds of skunk treats
Which treats weigh the least?
A. Dog treats
B. Rabbit treats
C. Cat treats
D. Skunk treats
24.
You do #2
Emily bought the following amounts of treats for
animals at the vet clinic.
2.0 pounds of dog treats
0.75 pounds of cat treats
0.5 pounds of rabbit treats
1.25 pounds of skunk treats
Which treats weigh the least?
A. Dog treats
B. Rabbit treats
C. Cat treats
D. Skunk treats
25.
Lesson Review
• When comparing decimals, start in the
tenths place. The decimal with the biggest
value there is greater. If they are the same,
move to the hundredths place and compare
these values. If the values are still the
same keep moving to the right until you
find one that is greater or until you find
that they are equal.
26.
Exit Ticket
Use the >,<, or = 0.07____ 0.7
A. <
B. >
C. =
27.
Exit Ticket Answer
• The correct answer is A.
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