Post on 31-Dec-2015
transcript
Five-Minute Check (over Lesson 1–5)
Main Idea and Vocabulary
Example 1:Expanded Form
Example 2:Compare Decimals
Example 3:Compare Decimals
• I will compare decimals.
• equivalent decimals
Expanded Form
Roano ran 1.68 miles. Wangari ran 1.50 miles. Who ran the longer distance?
One Way: Use a number line.
Numbers to the right are greater than numbers to the left. Since 1.68 is to the right of 1.50, 1.68 > 1.50.
Compare Decimals
Another Way: Use place value.
Line up the decimal points.
Compare the digits in the greatest place.
Continue comparing until the digits are different.
1.501.68 1.50
1.681.501.68
The ones digits are the same.
In the tenths place, 5 < 6. So, 1.50 < 1.68.
Compare Decimals
Answer: So, Roano ran the longer distance.
1. A
2. B
3. C
A. Melinda
B. Fredrick
C. Both walk the same distance.
Melinda walks 2.25 miles to work and Fredrick walks 2.47 miles to work. Who walks the longer distance to work?
0% 0%0%
Compare Decimals
Replace with <, >, or = to make 0.730 0.73 a true sentence.
0.730 = 0.730 Annex a zero. The value does not change.
Answer: So, 0.730 = 0.73.
1. A
2. B
3. C
A. <
B. >
C. =
Replace with <, >, =, or + to make 0.65 0.650 a true sentence.
0% 0%0%
Compare Decimals
Replace with <, >, or = to make 0.8 0.87 a true sentence.
0.87 → 0.87
Annex a zero to the right of 0.8 so that it has the same number of decimal places as 0.87.
Answer: Since 0 < 7 in the hundredths place, 0.8 < 0.87.
0.8 → 0.80
1. A
2. B
3. C
A. <
B. >
C. =
Replace with <, >, =, or + to make 5.3 5.32 a true sentence.
0% 0%0%
End of the Lesson
Five-Minute Check (over Lesson 1–5)
Image Bank
Math Tool Chest
Represent Decimals
1. A
2. B
3. C
4. D0% 0%0%0%
(over Lesson 1–5)
A. 30 + 0.04; thirty-four hundredths
B. 0.3 + 4; thirty-four hundredths
C. 0.3 + 0.04; thirty-four hundredths
D. 0.03 + 0.04; thirty-four hundredths
Write 0.34 in expanded form and word form.
1. A
2. B
3. C
4. D0% 0%0%0%
(over Lesson 1–5)
A. 4 + 0.2 + 0.06 + 0.002; four and two hundred sixty-two thousandths
B. 0.4 + 0.2 + 0.6 + 0.2; four and two hundred sixty-two thousandths
C. 0.04 + 0.2 + 0.06 + 0.2; four and two hundred sixty-two thousandths
D. 4 + 0.02 + 0.06 + 0.02; four and two hundred sixty-two thousandths
Write 4.262 in expanded form and word form.