Rounding
The Basics
Adding Decimals
Subtracting Decimals
CUBES
100
What is 5.42 rounded to the nearest WHOLE NUMBER?
5
100
What numbers tell you to round up?
5, 6, 7, 8, and 9
100
What is 1.54 + 2.46?
4
100
What is 5.7-2.3?
3.4
100
C - Write down the key numbers and units that would be circled: Amber sprinted first and ran 200 meters in 54.91 seconds. When it was Sam's turn, he sped off and completed the run in 46.07 seconds. How much faster was Sam than Amber in seconds?
200 meters, 54.91 seconds, 46.07 seconds
200
What is 0.329 rounded to the nearest HUNDREDTH?
0.33
200
What does it mean to "align the decimals"? You can explain or draw your answer.
To have all decimal points lined up vertically/under one another.
200
What is 11.32 + 5.7?
17.02
200
What is 14.5-8.6?
5.9
200
U - Write down the question that would be underlined: Amber sprinted first and ran 200 meters in 54.91 seconds. When it was Sam's turn, he sped off and completed the run in 46.07 seconds. How much faster was Sam than Amber in seconds?
How much faster was Sam than Amber in seconds?
300
What is 1,567.09 rounded to the nearest THOUSAND?
2,000
300
What numbers tell you to round down?
0, 1, 2, 3, and 4
300
What is 71.27 + 68.9?
140.17
300
What is 111.2-13.4?
97.8
300
B - Write down the action words that would be boxed: Amber sprinted first and ran 200 meters in 54.91 seconds. When it was Sam's turn, he sped off and completed the run in 46.07 seconds. How much faster was Sam than Amber in seconds?
How much faster
400
What is 674,980,011 rounded the the nearest TEN MILLION?
670,000,000
400
What do you add to numbers to make them equal length?
Zeros
400
What is 13+0.805?
13.805
400
What is 808.3-607.13?
201.17
400
What operation is used? Amber sprinted first and ran 200 meters in 54.91 seconds. When it was Sam's turn, he sped off and completed the run in 46.07 seconds. How much faster was Sam than Amber in seconds?
Subtraction
500
What is 2.799 rounded to the nearest HUNDREDTH?
2.80
500
Give a real world example for adding/subtracting decimals.
Discussion--answers may vary.
500
What is 74+1.3+0.45?
75.75
500
What is $2.01-$0.99?
$1.02
500
E/S: Evaluate, Eliminate, Show your work, and Check. Amber sprinted first and ran 200 meters in 54.91 seconds. When it was Sam's turn, he sped off and completed the run in 46.07 seconds. How much faster was Sam than Amber in seconds?
8.84 seconds faster
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