1. Everyday Math Grade 4 – Lesson 4.4 Decimal Addition and Subtraction
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2. Math Boxes
Lesson 4.4
Page 90
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3. Math Box 1:
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4. Math Box 2:
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5. Math Box 3:
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6. Math Box 4:
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7. Math Box 5:
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8. Everyday Math Grade 4 – Lesson 4.4 Decimal Addition and Subtraction
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9. PART 1: REVIEW
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10. Place Value
When we write numbers, the position or “place” of each number is important.
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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
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12. = or The Tenths Place Let’s Practice.
Write the decimal and the fraction for each. = or
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13. .26 or = 100 The Hundredths Place The second place to the right of the
decimal represents the hundredths place. 26
100
.26 or =
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14. = or The Hundredths Place Let’s Practice.
Write the decimal and the fraction for each. = or
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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
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16. Mixed Numbers or
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17. Mixed Numbers or
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18. Write the Decimal
5 tenths
50 hundredths
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19. Write the Decimal
7 hundredths
6 tenths
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20. Comparing Decimals When we compare numbers, we often use symbols.
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21. Comparing Decimals
When comparing numbers, think of Pac Man or an alligator. They EAT the BIGGER number.
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22. Comparing Decimals
Use the >, <, or = sign to complete the following:
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23. Comparing Decimals
Use the >, <, or = sign to complete the following:
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24. Comparing Decimals
Use the >, <, or = sign to complete the following:
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25. Comparing Decimals
Use the >, <, or = sign to complete the following:
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26. Compare ( > < =) . . H
Tens
Ones
Tenths
Hundredths H
Tens
Ones
Tenths
Hundredths . . . .
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27. Compare ( > < =) . . H
Tens
Ones
Tenths
Hundredths H
Tens
Ones
Tenths
Hundredths . . . .
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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 . . . .
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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 . . . .
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30. PART 2: ADD DECIMALS
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31. ADDING DECIMALS 1
2.78
9.10 + +
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32. ADDING DECIMALS 2
96.45
23.96 + +
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33. PART 3: SUBTRACT DECIMALS
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34. SUBTRACT DECIMALS 1
9.87
4.69 - -
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35. SUBTRACT DECIMALS 2
13.62
4.90 - -
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36. PART 4: ADD THREE DECIMALS
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37. ADDING DECIMALS 1
2.78
8.42
15.01 + + +
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38. PART 5: SOLVE & COMPARE
( > < =)
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39. SOLVE & COMPARE ( > < =)
PRACTICE 1: PRACTICE 2: =
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40. SOLVE & COMPARE ( > < =)
PRACTICE 3: – – 1.33 PRACTICE 4: 9.4 – – 4.7 =
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41. PART 5:
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42. Does this make sense?
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43. a
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44. Copyright © 2010 Kelly Mott

45. HOMEWORK
Page 88
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