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Lesson Topics Discussion Quiz: Class Homework

Steps-4

Title: Multiplication

Grade 4+ Lesson s3-l3

Explanation: Hello Students, time to practice and review the steps for the problem.

Quiz: Discussion Step

Discussion: Steps1 Steps2 Steps3 Steps4 Steps5

sbMath-row-a-ones-image5 = {sbMath-row-a-ones-image5}

Step

Value

Image

1

138
Factor

08

1

1

1

1

1

:

1

1

1

30

10

10

10

:

100

100

:

2

9
Factor

09

1

1

1

1

1

:

1

1

1

1

3

1242
Product

02

1

1

:

40

10

10

10

10

:

200

100

100

:

1000

1000

:
Step Description A B C D

B1

Carry

3

7

M1

Multiplicand

1

3

8

M2

Multiplier

×

0

9

A1

D3 9 × 8 = 72 C3 9 × 3 + 7 = 34 B3 9 × 1 + 3 = 12

9 3

3 27 7

7 72 2

S1

D3 Bring Down 2 C3 Bring Down 4 B3 Bring Down 12

12

4

2

Sum

Product: 138 x 9 = 1242

12

4

2
Id Type Name Note

1

Problem

What is the product if the multiplicand is 138 and the multiplier is 9?

2

Clue

Product means Multiplication
\$\times\$

3

Step

Multiply the number 139 by 9

\$138 times 9\$

4

Step

After the multiplication, we get

1,242.00

5

Sumup

Please summarize steps

Choices

6

Choice-A

This value is less than the correct product by 18, so it does not match the true result

Wrong 1224

7

Choice-B

Incorrect.This number is too high, showing an overestimation of the product

Wrong 1424

8

Choice-C

This is close but still 2 more than the correct product, so it’s incorrect

Wrong 1244

9

Choice-D

This is correct because when 138 is multiplied by 9, the result is 1242

Correct 1242

10

Answer

Option

D

11

Sumup

Please summarize choices

Discussion: Steps1 Steps2 Steps3 Steps4 Steps5

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