**Answer Key**

CHAPTER 4 Understanding Multiplication

Lesson 1

**Activity**(pages 216 and 217)

1. Add: 1 + 1 + 1 + 1 = 4 Multiply: 4 x 1 = 4

2. Add: 2 + 2 = 4 Multiply: 2 x 2 = 4

3. Add: 2 + 2 + 2 + 2 = 8 Multiply: 4 x 2 = 8

4. Add: 2 + 2 + 2 + 2 + 2 = 10 Multiply: 5 x 2 = 10

**Activity**(page 218)

**Activity**(page 219)

2 x 2 = 4 2 x 5 = 10 2 x 8 = 16

2 x 3 = 6 2 x 6 = 12 2 x 9 = 18

2 x 4 = 8 2 x 7 = 14 2 x 10 = 20

**On The Road to Learning**(page 220)

A. 1. 6 x 2 = 12 4. 9 x 2 = 18

2. 8 x 2 = 16 5. 4 x 2 = 8

3. 10 x 2 = 20 6. 7 x 2 = 14

B. 1. 5 + 5 + 5 + 5 = 20

2.

B.3. 4 x 5 = 20

**Creating My Math Word Corner**(page 222)

Sample answers: multiplication, multiplier, multiplicand, product, factors

**Showing What I Have Learned**

**Hitting the Mark**(pages 223 and 224)

A. 1. There are 5 groups of guavas. Each group has 2 guavas.

2 + 2 + 2 + 2 + 2 = 10

2. There are 4 vases of flowers. Each vase has 2 flowers.

2 + 2 + 2 + 2 = 8

B.

C.

1. There are 2 pans.

2. There are 6 chocolate candies in each pan.

3. 2 x 6 = 12

There are 12 chocolate candies in all.

Addition Multiplication

1. 2 + 2 + 2 + 2 + 2 + 10 x 2 = 20

2 + 2 + 2 + 2 + 2 = 20

2. 10 + 10 = 20 2 x 10 = 20

3. 5 + 5 + 5 + 5 = 20 4 x 5 = 20

4. 4 + 4 + 4 + 4 + 4 = 20 5 x 4 = 20

Answers may vary. Sample answers:

1. I can memorize multiplication facts easier by counting the number of equal groups multiplied to the

number of members on each group.

2. I find it difficult when I use number line in multiplying numbers.

3. I learned that “x” is used to write multiplication.

1. There are 2 pans.

2. There are 6 chocolate candies in each pan.

3. 2 x 6 = 12

There are 12 chocolate candies in all.

**Going Beyond the Mark**(page 225)Addition Multiplication

1. 2 + 2 + 2 + 2 + 2 + 10 x 2 = 20

2 + 2 + 2 + 2 + 2 = 20

2. 10 + 10 = 20 2 x 10 = 20

3. 5 + 5 + 5 + 5 = 20 4 x 5 = 20

4. 4 + 4 + 4 + 4 + 4 = 20 5 x 4 = 20

**(page 225)**

Understanding How I LearnedUnderstanding How I Learned

Answers may vary. Sample answers:

1. I can memorize multiplication facts easier by counting the number of equal groups multiplied to the

number of members on each group.

2. I find it difficult when I use number line in multiplying numbers.

3. I learned that “x” is used to write multiplication.