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Lesson Topics Discussion Quiz: Class Homework

Steps-3

Title: Multiplication

Grade 4+ Lesson s2-l2

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

52
Factor

02

1

1

:

50

10

10

10

10

10

:

2

21
Factor

01

1

:

20

10

10

:

3

1092
Product

02

1

1

:

90

10

10

10

10

10

:

10

10

10

10

1000

1000

:
Step Description A B C D

B1

Carry

10

4

M1

Multiplicand

0

5

2

M2

Multiplier

×

2

1

A1

D3 21 × 2 = 42 C3 21 × 5 + 4 = 109 B3 21 × 0 + 10 = 10

00 10

10 105 4

4 42 2

S1

D3 Bring Down 2 C3 Bring Down 9 B3 Bring Down 10

10

9

2

Sum

Product: 52 x 21 = 1092

10

9

2
Id Type Name Note

1

Problem

Multiply 52 by 21.

2

Clue

Product means Multiplication
\$\times\$

3

Step

Multiply the number 52 by 21

\$52 times 21\$

4

Step

After the multiplication and we get

1092

5

Sumup

Please summarize steps

Choices

6

Choice-A

The product of 52 and 21 is 1092, not 1082. Therefore, option A is incorrect

Wrong 1082

7

Choice-B

The product of 52 and 21 is indeed 1092.So, option B is correct

Correct 1092

8

Choice-C

The product of 52 and 21 is 1092, not 1072. Therefore option C is incorrect

Wrong 1072

9

Choice-D

The product of 52 and 21 is 1092, not 1062. Therefore option D is incorrect

Wrong 1062

10

Answer

Option

B

11

Sumup

Please summarize choices

Discussion: Steps1 Steps2 Steps3 Steps4 Steps5

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