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Thursday, October 27 th. Warm Up. Please take out your homework and complete warm up Did you write down your homework?. Order from least to greatest 2.5, 2.51, 2 2. Change to decimal form . Corny Joke of the Day. Why didn’t the mummy have any friends? - PowerPoint PPT Presentation
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Thursday, October 27th • Please take out your homework and
complete warm up• Did you write down your homework?
1. Order from least to greatest 2.5, 2.51, 2
2. Change to decimal form
Warm Up3449
Corny Joke of the Day
Why didn’t the mummy have any
friends?
He was too wrapped up in himself
Schedule for the WeekThursday: adding and
subtracting decimal integersFriday: Adding and subtracting fraction integers
Tuesday: Checkpoint
Fraction Test Congrats to test Toppers
Retest?O 75 and above you will complete a packet
O74 and below you are eligible for a reteach
OTuesday 11/1 will be the reteach
OWednesday 11/2 will be the retest
Retest QualificationsO All Homework must from unit must be complete before you retake the test
ORetest formORetake packet must be complete before you retake the test
You need to tell me by
Tomorrow!!!
Homework Answers
Around the World
Question of the Day?!?!How do add and subtract decimals that are positive and negative?!?!
Use zero as a placeholder so thatboth numbers have the same numberof digits after their decimal points.
Add each column just as you wouldadd integers.
Line up the decimal points.
70.8
66.8+ 4.0
Decimal Review
Negative/Positive Review Same sign add and keepDifferent sign subtractTake the sign of the farther numberThen it'll be exact! Change the minus to a plusChange the sign of nextThen all you do is add them upAs if it were a plus!
Add. Estimate to check whether each answer is reasonable.
4.55 + 11.3
Line up the decimal points.Use zero as a placeholder.
4.55+ 11.30
15.85 Add.
Estimate5 + 11 = 16 15.85 is a reasonable answer.
Add. Estimate to check whether each answer is is reasonable.
6.44 + 16
Line up the decimal points.Use zeros as placeholders.
6.44+ 16.00
22.44 Add.
Estimate6 + 16 = 22 22.44 is a reasonable answer.
Add. Estimate to check whether each answer is reasonable.
–8.33 + (–10.972) –8.33 + (–10.972) Think: 8.33 + 10.972.
Line up the decimal points.
Add.–8.33 + (–10.972) = –19.302
Use the sign of the two numbers.
8.330+10.972 Use zero as a placeholder.
19.302
Estimate–8 + (–11) = –19 –19.302 is a reasonable
answer.
Add. Estimate to check whether each answer is is reasonable.
6.78 + 13.2
Line up the decimal points.Use zero as a placeholder.
6.78+ 13.20
19.98 Add.
Estimate7 + 13 = 20 19.98 is a reasonable answer.
Add. Estimate to check whether each answer is reasonable.
–7.89 + (–13.852) –7.89 + (–13.852) Think: 7.89+ 13.852.
Line up the decimal points.
Add.–7.89 + (–13.852) = –21.742
Use the sign of the two numbers.
7.890+13.852 Use zero as a placeholder.
21.742
Estimate–8 + (–14) = –22 –21.742 is a reasonable
answer.
2.56; Estimate: 7 – 4 = 3
21.25; Estimate: 7 + 14 = 21
–27.66; Estimate: -8 + (-19) = -27
4. 24 – 3.820.2; Estimate: 24 - 4 = 20
Add. Estimate to check whether your answer is reasonable.1. 6.98 + 14.27 2. –8.46 + (–19.2)
3. 6.72 – 4.16
Subtract. Estimate to check whether your answer is reasonable.
Group Work