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Lesson Table Topics Discussion Quiz: Class Homework

Steps-4

Title: Multiplication

Grade 4+ Lesson s1-l1

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

39
Factor

09

1

1

1

1

1

:

1

1

1

1

30

10

10

10

:

2

21
Factor

01

1

:

20

10

10

:

3

819
Product

09

1

1

1

1

1

:

1

1

1

1

10

10

:

800

100

100

100

100

100

:

100

100

100
Step Description A B C D

B1

Carry

6

18

0

M1

Multiplicand

0

3

9

M2

Multiplier

×

2

1

A1

D3 21 × 9 = 189 C3 21 × 3 + 18 = 81 B3 21 × 0 + 8 = 8

8 02 6

8 63 18

18 189 9

S1

D3 Bring Down 9 C3 Bring Down 1 B3 Bring Down 8

8

1

9

Sum

Product: 39 x 21 = 819

8

1

9
Id Type Name Note

1

Problem

Find the product of 39 and 21.

2

Step

Product means Multiplication

\$\times\$

3

Step

Multiply the number 39 with 21

39 × 21

4

Step

After the multiplication and we get

819.00

5

Sumup

Please summarize steps

Choices

6

Choice-A

This is incorrect and as it is not the correct product of 39 and 21

Wrong 619

7

Choice-B

This is incorrect and as it is not the correct product of 39 and 21

Wrong 719

8

Choice-C

This is incorrect and as it is not the correct product of 39 and 21

Wrong 919

9

Choice-D

This is the correct answer and as it accurately represents the product of 39 and 21

Correct 819

10

Answer

Option

D

11

Sumup

Please summarize choices

Discussion: Steps1 Steps2 Steps3 Steps4 Steps5

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