Using Subtraction to solve one step word problems Lesson 15 Using Subtraction to solve one step word problems
Lesson Objective After this lesson you will be able to: Use the standard subtraction algorithm to solve one step word problems. You will also be using your place value understanding to decompose numbers smaller units to solve one step word problems.
Let’s Start with a Problem When the amusement park opened, the number on the counter at the gate read 928,614. At the end of the day, the counter read 931,682. How many people went through the gate that day?
Problem # 1 When the amusement park opened, the number on the counter at the gate read 928,614. At the end of the day, the counter read 931,682. How many people went through the gate that day? What do I need to solve for? What do I know?
Problem # 1 When the amusement park opened, the number on the counter at the gate read 928,614. At the end of the day, the counter read 931,682. How many people went through the gate that day? What do I need to solve for? What do I know?
It’s time to create our handy dandy… Problem # 1 It’s time to create our handy dandy…
It’s time to create our handy dandy… NOTEBOOK! Problem # 1 It’s time to create our handy dandy… NOTEBOOK!
It’s time to create our handy dandy… NOTEBOOK! Just kidding. : ) Problem # 1 It’s time to create our handy dandy… NOTEBOOK! Just kidding. : ) We need to create a tape diagram.
Problem # 1 Where do our numbers 928,614 and 931,682 go?
Problem # 1 931,682 928,614 P
Problem # 1 Now it’s time to set-up our subtraction problem. 931,682 928,614 P Now it’s time to set-up our subtraction problem.
Problem # 1 Are we ready to subtract? 931,682 - 928,614
- 928,614 931,682 Problem # 1 Are we ready to subtract? Remember to check if we need to regroup. 931,682 - 928,614
Problem # 1 Let’s go ahead and regroup now. 931,682 - 928,614
Problem # 1 Let’s go ahead and regroup now. Are we ready to subtract? 2 11 7 12 931,682 - 928,614
Problem # 1 Remember to start with the ones and work our way up. 2 11 7 12 931,682 928,614 8
Problem # 1 Remember to start with the ones and work our way up. 2 11 7 12 931,682 928,614 68
Problem # 1 Remember to start with the ones and work our way up. 2 11 7 12 931,682 928,614 068
Problem # 1 Remember to start with the ones and work our way up. 2 11 7 12 931,682 928,614 3,068
Problem # 1 Remember to start with the ones and work our way up. 2 11 7 12 931,682 928,614 03,068
Problem # 1 Remember to start with the ones and work our way up. 2 11 7 12 931,682 928,614 003,068
Problem # 1 So our final answer is 3,068 people. 2 11 7 12 931,682 928,614 3,068
Let’s Try One More Problem Last year, there were 620,073 people in attendance at a local parade. This year, there were 456,795 people in attendance. How many more people were in attendance last year?
Let’s Try One More Problem Last year, there were 620,073 people in attendance at a local parade. This year, there were 456,795 people in attendance. How many more people were in attendance last year? With a partner create a tape diagram for this problem.
Problem # 2 Did your partner and you get…
Problem # 2 Did your partner and you get this or something similar? 620,073 Last year This year 456,795 A
Problem # 2 Now it’s time for you to solve this subtraction problem on your own… 620,073 - 456,795
Problem # 2 Did you get… 620,073 - 456,795
Problem # 2 Did you get… 11 9 9 16 5 12 10 10 17 13 620,073 - 456,795
Problem # 2 Did you get… 11 9 9 16 5 12 10 10 17 13 620,073 - 456,795 163,278
Great Job! All right now it is your turn! Complete the 3 Problems on page 82