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Chapter 4Alabama 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
Vocabulary Lesson 4.2 Lesson 4.4 Lesson 4.6
Lesson 4.1 Lesson 4.3 Lesson 4.5
Home
1. 14 + 142. 12 + 213. 42 + 254. 90 + 185. 25 + 49
Lesson 4.6 objective – To write expressions and number sentences that represent situations and to select operation symbols to make number sentences true
Guided instruction/practice
Independent practice
1. MB p. 81 #’s 7-19 odd2. In your journal do MB p. 81 #’s 23-27 odd3. Choose a math game from the box.
1. 350 + 402. 150 + 2123. 560 + 1614. 205 + 525. 90 + 215
Lesson 4.5 objective – To choose mental math, paper and pencil, or a calculator to add 4 digit numbers with and without regrouping
4,365 + 3,852
Guided instruction
Let’s look at MB p. 77 and we will do #’s 1-10 together.
Guided practice
1. MB p. 78 #’s 11- 31 odd2. MB p. 79 #’s 41-47 odd3. Choose a math game from the box
Independent practice
1. 21 + 62. 45 + 153. 9 + 364. 72 + 85. 12 + 13
Lesson 4.4 objective – to solve problems using the strategy predict and test.
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?
Guided instruction
Let’s look at MB p. 75 #’s 1-4
Guided practice
1. MB p. 75 #’s 5-8 all2. Answer this question in your journal: How
do you know whether a prediction you made is correct or incorrect.
3. Choose a game from the box
Independent practice
1. 7 + ___ = 132. ___ + 9 = 183. 5 + 6 =4. 8 + 7 =5. 6 + 8 =
Lesson 4.3 objective – to add 3 and 4 digit numbers with and without regrouping.
224 +511
$9.07+$1.25
1,298+1,872
Guided instruction/practice
1. MB p. 73 #’s 6-14 even and 30-32 even – stack on my table
2. Math worksheet To be taken up at 2:15 finished or not.
3. Choose a math game from the box.
Independent practice
1. 12 + 102. 14 + 153. 41 + 394. 25 + 365. 21 + 57
Lesson 4.2 objective: to explore adding 3 digit numbers with and without regrouping.
116+ 144
269+ 358
Guided instruction/practice
Addition of Three-Digit Numbers Addition with regrouping 3 addends Addition of 3 digit numbers with regro
uping
1. MB p. 71 #’s 1-9 odd and 13-15 odd2. Copy this table in your journal. Fill in the
empty squares by adding across each row, and adding the numbers down each column.
3. Missing AR/Unfinished work4. Choose a math game from the box
Independent practice
267 389
119 437
1. 5 + 252. 30 + 203. 70 + 204. $4 + $65. 20 + 55
Lesson 4.1 objective: To estimate sums of 2, 3, and 4 digit numbers using rounding and front-end estimation.
Rounding to estimate sums
329+174
AAAmath.com
Guided instruction
Rounding quiz Front-end estimation video
Turn in your books to page 69 and we will do 1-5.
Guided practice
1. MB p. 69 #’s 6-12 even and 20-22 even2. Use rounding to answer this problem in
your journal:Jenna spent $3.79 for markers and $4.95 for a notebook.
3. Choose a math game from the black box.
Independent practice
EstimateExpression
Front end estimation
Not equal to ≠
Chapter 4 Vocabulary
To find out about how much or how many
Estimate
A method of estimating in which only the front digits are used
Front-end estimation
The part of a number sentence that combines numbers and operation signs.
Example:5 + 6
Expression
A relation symbol used to show that two numbers are not equal to each other.
Not equal to ≠
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?
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?
