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Topic D a dding and subtracting decimals

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abbot-casey
24 diapositives · 449 Views · Nov 19, 2014

Topic D a dding and subtracting decimals. STANDARD - 5.NBT.2, 5.NBT.3, 5.NBT.7. Grade 5 Module 1 Lesson 10. Objective: S ubtract decimals using place value 
strategies and relate those strategies 
to a written method. MATERIALS NEEDED FOR THIS LESSON. Student. Student Pages.

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  1. Topic D adding and subtracting decimals STANDARD - 5.NBT.2, 5.NBT.3, 5.NBT.7

  2. Grade 5 Module 1 Lesson 10 Objective: Subtract decimals using place value 
strategies and relate those strategies 
to a written method.

  3. MATERIALS NEEDED FOR THIS LESSON Student Student Pages Place Value Chart Personal White Boards Problem Set Exit Ticket Homework Teacher Teacher Pages

  4. Fluency Practice(10 minutes)

  5. Take Out the Unit 3 minutes 5.NBT.1 76.358 = _____ Say the number 76.358 = 7 tens _____ thousandths 76.358 = 763 tenths _____ thousandths 76.358 = _____ hundredths 8 thousandths

  6. Add Decimals 3 minutes 5.NBT.7 3 tenths + 2 tenths = _____ 5 hundredths + 4 hundredths = 35 hundredths + 4 thousandths =

  7. One Unit Less 4 minutes 5.NBT.7 What is 1 less than 5 tenths? 5 hundredths? 5 thousandths?

  8. What is 1 less than 7 hundredths? 9 tenths?

  9. Write the decimal that is one less thousandths 0.029 Write the decimal that is one tenth less 0.61

  10. Write the decimal that is 1 thousandth less 
than 0.061? Write the decimal that is 1 hundredth less 
than 0.549?

  11. Application Problem (5 minutes) At the 2012 London Olympics, Michael Phelps 
won the gold medal in men's 100 meter butterfly. 
He swam the first 50 meters in 26.96 seconds. 
the second 50 meters took him 25.39 seconds. 
What was his total time?

  12. Concept Development (35 minutes)

  13. Problem 1 subtracting decimals 5 tenths - 3 tenths ones tenths thousandths hundredths

  14. 7 ones 5 thousandths - 2 ones 3 thousandths ones tenths thousandths hundredths

  15. 9 hundreds 5 hundredths - 3 hundredths hundreds ones tens tenths thousandths hundredths

  16. Problem 2 subtracting decimals 85 tenths - 6.4 ones tenths thousandths hundredths

  17. Problem 3 subtracting decimals 9.2 - 6 ones 4 tenths ones tenths thousandths hundredths

  18. 0.831 - 0.292 ones tenths thousandths hundredths

  19. 4.003 - 1.29 ones tenths thousandths hundredths

  20. 6 - 4.08 ones tenths thousandths hundredths

  21. Problem Set (10 minutes) Do Your Personal Best (Complete independently!)

  22. Student Debrief (10 minutes) How could you change Mrs. Fan's 
question in #4 so that Michael's answer 
is correct? How is subtracting decimals fractions the same as 
subtracting whole numbers? How is it different? Look at #2 a, b, and c. What process did you use 
to find the difference in each of these problems? Did you have to use the standard algorithm 
to solve #3? Look at b and c. Which one was 
more challenging? In #3f, how did you think about finding the 
difference between 59 hundredths from 2 ones 
4 tenths? Explain your approach.

  23. EXIT TICKET (3 minutes) Complete the exit ticket and turn in...

  24. HOMEWORK