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4th Grade Math

Math lesson for final student teaching observation- Fall 2012
by

jenna cerce

on 28 November 2012

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Transcript of 4th Grade Math

By the end of this lesson, you will be able to use partial products to multiply 2-digit numbers. Objective: Using Partial Products (Box Method) Classwork 43 = 40 + 3
25 = 20 + 5 43
x 25 Step 2: Write the top number along the top of the box and the bottom number along the side of the box. 20 x 40 =
20 x 3 =
5 x 40 =
5 x 3 = Step 3: Find the partial products. Write them in the boxes. Use the Box Method to solve these problems. Example 1 25
x 62 43
x 25 Step 1: Break apart the factors into tens and ones. 40 3 20

5 40 3 20 5 Step 4: Add the partial products. 800
60
200
+ 15 40 3 20 5 43 x 25 = 20 5 60 2 Example 2 76
23 70 6 20 3 Word Problem There are 36 classes in a school. Each class has 24 students. How many students are in the school? x Word Problem There are 18 players in a soccer club. The club wants to purchase new sweatshirts for each of the players. The sweatshirts cost $24 each. The club has $420. Is this enough money to buy each player a sweatshirt? If not, how much more money is needed? x 82
x 14 65
x 39 x Additional Problem 85
x 72 Homework Problems 22
18 x 1. 2. 37
96 x 3. 68
49 x
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