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Lesson Topics Discussion Quiz: Class Homework

Steps-5

Title: Multiplication

Grade 4+ Lesson s3-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-image100 = {sbMath-row-a-ones-image100}

Step

Value

Image

1

129
Factor

09

1

1

1

1

1

:

1

1

1

1

20

10

10

:

100

100

:

2

2
Factor

08

1

1

1

1

1

:

1

1

1

3

258
Product

08

1

1

1

1

1

:

1

1

1

50

10

10

10

10

10

:

200

100

100

:
Step Description A B C D

B1

Carry

1

M1

Multiplicand

0

1

2

9

M2

Multiplier

×

0

2

A1

D3 9 × 2 = 18 C3 2 × 2 + 1 = 5 B3 2 × 1 = 2

0

2

4 1

1 18 8

S1

D3 Bring Down 8 C3 Bring Down 5 B3 Bring Down 2

2

5

8

Sum

Product: 129 x 2 = 258

2

5

8
Id Type Name Note

1

Problem

Multiply 129 × 2.

2

Step

Multiply the number 129 by 2

\$129 times 2\$

3

Step

After the multiplication, we get

258

4

Sumup

Please summarize steps

Choices

5

Choice-A

Incorrect, this number is not the exact product of 129 × 2

Wrong 658

6

Choice-B

That is correct; this is the exact result when multiplying 129 by 2

Correct 258

7

Choice-C

Incorrect, this number is not the exact product of 129 × 2

Wrong 758

8

Choice-D

Incorrect; it is significantly higher than the correct answer

Wrong 558

9

Answer

Option

B

10

Sumup

Please summarize choices

Discussion: Steps1 Steps2 Steps3 Steps4 Steps5

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