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Chapter 4

Chapter 4. Alabama State Course of study standard:

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Chapter 4

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  1. Chapter 4 Alabama State Course of study standard: Solve addition and subtraction problems, including word problems, involving two- and three-digit numbers with and without regrouping.• Estimating sums and differences using multiple methods, including compatible numbers and rounding, to judge the reasonableness of an answer Power point by Susie Mumper 2011

  2. Home • Lesson 4.1 • Lesson 4.3 • Lesson 4.5 • Vocabulary • Lesson 4.2 • Lesson 4.4 • Lesson 4.6

  3. Lesson 4.6 objective – To write expressions and number sentences that represent situations and to select operation symbols to make number sentences true • 14 + 14 • 12 + 21 • 42 + 25 • 90 + 18 • 25 + 49

  4. Guided instruction/practice

  5. Independent practice • MB p. 81 #’s 7-19 odd • In your journal do MB p. 81 #’s 23-27 odd • Choose a math game from the box.

  6. Lesson 4.5 objective – To choose mental math, paper and pencil, or a calculator to add 4 digit numbers with and without regrouping • 350 + 40 • 150 + 212 • 560 + 161 • 205 + 52 • 90 + 215

  7. Guided instruction 4,365 + 3,852

  8. Guided practice • Let’s look at MB p. 77 and we will do #’s 1-10 together.

  9. Independent practice • MB p. 78 #’s 11- 31 odd • MB p. 79 #’s 41-47 odd • Choose a math game from the box

  10. Lesson 4.4 objective – to solve problems using the strategy predict and test. • 21 + 6 • 45 + 15 • 9 + 36 • 72 + 8 • 12 + 13

  11. Guided instruction • Let’s read the problem at the top of p. 74 together • What are we asked to find? • What information will we need? • Is there any information you will not use? • Is this a simple addition problem in which you are finding the sum? • How is the first prediction tested?

  12. Guided practice • Let’s look at MB p. 75 #’s 1-4

  13. Independent practice • MB p. 75 #’s 5-8 all • Answer this question in your journal: How do you know whether a prediction you made is correct or incorrect. • Choose a game from the box

  14. Lesson 4.3 objective – to add 3 and 4 digit numbers with and without regrouping. • 7 + ___ = 13 • ___ + 9 = 18 • 5 + 6 = • 8 + 7 = • 6 + 8 =

  15. Guided instruction/practice 224 +511 $9.07 +$1.25 1,298 +1,872

  16. Independent practice • MB p. 73 #’s 6-14 even and 30-32 even – stack on my table • Math worksheet To be taken up at 2:15 finished or not. • Choose a math game from the box.

  17. Lesson 4.2 objective: to explore adding 3 digit numbers with and without regrouping. • 12 + 10 • 14 + 15 • 41 + 39 • 25 + 36 • 21 + 57

  18. Guided instruction/practice 116 + 144 269 + 358

  19. Addition of Three-Digit Numbers • Addition with regrouping 3 addends • Addition of 3 digit numbers with regrouping

  20. Independent practice • MB p. 71 #’s 1-9 odd and 13-15 odd • Copy this table in your journal. Fill in the empty squares by adding across each row, and adding the numbers down each column. • Missing AR/Unfinished work • Choose a math game from the box

  21. Lesson 4.1 objective: To estimate sums of 2, 3, and 4 digit numbers using rounding and front-end estimation. • 5 + 25 • 30 + 20 • 70 + 20 • $4 + $6 • 20 + 55

  22. Guided instruction • Rounding to estimate sums 329 +174 AAAmath.com

  23. Front-end estimation 329 +174 Aaamath.com

  24. Rounding quiz • Front-end estimation video

  25. Guided practice • Turn in your books to page 69 and we will do 1-5.

  26. Independent practice • MB p. 69 #’s 6-12 even and 20-22 even • Use rounding to answer this problem in your journal: Jenna spent $3.79 for markers and $4.95 for a notebook. • Choose a math game from the black box.

  27. Chapter 4 Vocabulary • Front end estimation • Not equal to ≠ • Estimate • Expression

  28. Estimate To find out about how much or how many

  29. Front-end estimation A method of estimating in which only the front digits are used

  30. Expression The part of a number sentence that combines numbers and operation signs. Example: 5 + 6

  31. Not equal to ≠ A relation symbol used to show that two numbers are not equal to each other.

  32. Lesson 4.5 To find this secret number, add the greatest whole number that rounds to 50 and the least number that rounds to 80. What is the secret number? 54+75=129

  33. Lesson 4.6 Katelyn’s number has as many tens as Keilan’s number has ones and as many ones as Keilan’s number has tens. If Katelyn subtracts 9 from his number and sandra adds 9 to her number, they will each have the same number, 22. What are their numbers? Katelyn, 31 Keilan, 13

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