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Lesson Example Discussion Quiz: Class Homework

Step-2

Title: Subtraction of Whole Numbers

Grade: 4-a Lesson: S1-L4

Explanation: Let us verify the answer here with the steps.

Discussion: Step1 Step2 Step3 Step4 Step5

Lesson Steps Head1

Step Type Explanation Answer

1

Problem

Keith has 987 baseball cards. George bought 475 of Keith’s baseball cards. How many baseball cards does Keith have now?

2

Clue

More implies comparision

Subtraction

3

Hint

Operator used: Subtraction

-

4

Step

Keith’s initial number of baseball cards

987

5

Step

Number of cards George bought

475

6

Formula:

Calculation of baseball cards does Keith have

Calculation of Keith’s card = Keith’s initial number of baseball cards + Number of cards George bought

7

Step

Now plug the values in the formula

987 - 475

8

Step

After subtraction

512

9

Step

So, Keith has 512 baseball cards now.

10

SumUp

Can you summarize what you’ve understood in the above steps?

11

Choice.A

This is wrong ,it does not represent the correct calculation

508

12

Choice.B

This is correct because it correctly calculates

512

13

Choice.C

This is wrong ,it does not represent the correct calculation

521

14

Choice.D

This is wrong ,it does not represent the correct calculation

547

15

Answer

Option

B

16

SumUp

Can you summarize what you’ve understood in the above steps?

Discussion: Step1 Step2 Step3 Step4 Step5

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