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Everyday Math Grade 4 – Lesson 4.4 Decimal Addition and Subtraction

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Presentation on theme: "Everyday Math Grade 4 – Lesson 4.4 Decimal Addition and Subtraction"— Presentation transcript:

1 Everyday Math Grade 4 – Lesson 4.4 Decimal Addition and Subtraction
Copyright © 2011 Kelly Mott

2 Math Boxes Lesson 4.4 Page 90 Copyright © 2010 Kelly Mott

3 Math Box 1: Copyright © 2010 Kelly Mott

4 Math Box 2: Copyright © 2010 Kelly Mott

5 Math Box 3: Copyright © 2010 Kelly Mott

6 Math Box 4: Copyright © 2010 Kelly Mott

7 Math Box 5: Copyright © 2010 Kelly Mott

8 Everyday Math Grade 4 – Lesson 4.4 Decimal Addition and Subtraction
Copyright © 2011 Kelly Mott

9 PART 1: REVIEW Copyright © 2011 Kelly Mott 9

10 Place Value When we write numbers, the position or “place” of each number is important. Copyright © 2011 Kelly Mott

11 = .3 or 10 The Tenths Place The first place to the right of the
decimal represents the tenths place. EXAMPLE: 3 10 = .3 or Copyright © 2011 Kelly Mott

12 = or The Tenths Place Let’s Practice.
Write the decimal and the fraction for each. = or Copyright © 2011 Kelly Mott

13 .26 or = 100 The Hundredths Place The second place to the right of the
decimal represents the hundredths place. 26 100 .26 or = Copyright © 2011 Kelly Mott

14 = or The Hundredths Place Let’s Practice.
Write the decimal and the fraction for each. = or Copyright © 2011 Kelly Mott

15 Mixed Numbers A mixed number is a whole number and a fraction or a part of a whole. 8 10 2.8 or 2 Copyright © 2011 Kelly Mott

16 Mixed Numbers or Copyright © 2011 Kelly Mott

17 Mixed Numbers or Copyright © 2011 Kelly Mott

18 Write the Decimal 5 tenths 50 hundredths Copyright © 2011 Kelly Mott

19 Write the Decimal 7 hundredths 6 tenths Copyright © 2011 Kelly Mott

20 Comparing Decimals When we compare numbers, we often use symbols.
Copyright © 2011 Kelly Mott

21 Comparing Decimals When comparing numbers, think of Pac Man or an alligator. They EAT the BIGGER number. Copyright © 2011 Kelly Mott

22 Comparing Decimals Use the >, <, or = sign to complete the following: Copyright © 2011 Kelly Mott

23 Comparing Decimals Use the >, <, or = sign to complete the following: Copyright © 2011 Kelly Mott

24 Comparing Decimals Use the >, <, or = sign to complete the following: Copyright © 2011 Kelly Mott

25 Comparing Decimals Use the >, <, or = sign to complete the following: Copyright © 2011 Kelly Mott

26 Compare ( > < =) . . H Tens Ones Tenths Hundredths H Tens Ones Tenths Hundredths . . . . Copyright © 2011 Kelly Mott

27 Compare ( > < =) . . H Tens Ones Tenths Hundredths H Tens Ones Tenths Hundredths . . . . Copyright © 2011 Kelly Mott

28 ORDER: LEAST TO GREATEST
Line up the numbers. Then put them in order. Cross out the numbers as you go. Now put them in order from least to greatest: ________ ________ ________ ________ ________ . H Tens Ones Tenths Hundredths Order these numbers: 0.04, 0.4, 0.44, 4.4 . . . . Copyright © 2011 Kelly Mott

29 ORDER: GREATEST TO LEAST
Line up the numbers. Then put them in order. Cross out the numbers as you go. Now put them in order from greatest to least: ________ ________ ________ ________ ________ . H Tens Ones Tenths Hundredths Order these numbers: 0.02, 0.20, 0.22, 2.02 . . . . Copyright © 2011 Kelly Mott

30 PART 2: ADD DECIMALS Copyright © 2011 Kelly Mott 30

31 ADDING DECIMALS 1 2.78 9.10 + + Copyright © 2011 Kelly Mott

32 ADDING DECIMALS 2 96.45 23.96 + + Copyright © 2011 Kelly Mott

33 PART 3: SUBTRACT DECIMALS
Copyright © 2011 Kelly Mott 33

34 SUBTRACT DECIMALS 1 9.87 4.69 - - Copyright © 2011 Kelly Mott

35 SUBTRACT DECIMALS 2 13.62 4.90 - - Copyright © 2011 Kelly Mott

36 PART 4: ADD THREE DECIMALS
Copyright © 2011 Kelly Mott 36

37 ADDING DECIMALS 1 2.78 8.42 15.01 + + + Copyright © 2011 Kelly Mott

38 PART 5: SOLVE & COMPARE ( > < =) Copyright © 2011 Kelly Mott 38

39 SOLVE & COMPARE ( > < =)
PRACTICE 1: PRACTICE 2: = Copyright © 2011 Kelly Mott

40 SOLVE & COMPARE ( > < =)
PRACTICE 3: – – 1.33 PRACTICE 4: 9.4 – – 4.7 = Copyright © 2011 Kelly Mott

41 PART 5: Copyright © 2011 Kelly Mott 41

42 Does this make sense? Copyright © 2011 Kelly Mott

43 a Copyright © 2011 Kelly Mott

44 Copyright © 2010 Kelly Mott

45 HOMEWORK Page 88 Copyright © 2011 Kelly Mott

46


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