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.

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

Understanding How I Learned (page 225)
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.

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