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## Go Math Grade 3 Chapter 4 Multiplication Facts and Strategies Extra Practice Answer Key

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### Common Core – Page No. 87000

**Lessons 4.1â€“4.2**

**Find the product.**

Question 1.

4 Ã— 2 = ______

Answer:

4 Ã— 2 = 8.

Explanation:

Double 2Ã—2 to get 4Ã—2.

2 x 2 = 4.

Double: 4 + 4 = 8.

4 x 2 = 8.

Question 2.

8 Ã— 5 = ______

Answer:

8 x 5 = 40

Explanation:

Factor 8 is an even number. 4+ 4

5 x 4 = 20.

20 doubled is 40.

8 x 5 = 40.

Question 3.

10 Ã— 7 = ______

Answer:

10 Ã— 7 = 70

Explanation:

A multiple of 10 is any product that has 10 as one of its factors. So, the multiplication of any number with 10 is 10â€™s of that particular number. The answer is 10 Ã— 7 = 70.

Question 4.

2 Ã— 9 = ______

Answer:

2 x 9 = 18

Explanation:

Double the given number 6 to get the final answer. The answer is 9 + 9 = 18.

2 x 9 = 18.

Question 5.

6

Ã— 1 0

——-

______

Answer:

6 x 10 = 60

Explanation:

Using doubles, we can find a 6 x 10 value. First, multiply the factor with half of 6. So, now we can do 3 x 10 = 30. Now, we can double the value of 3 x 10. That is 30 + 30 = 60. So, the answer for 6 x 10 = 60.

Question 6.

5

Ã— 7

——-

______

Answer:

5 x 7 = 35.

Explanation:

Skip count by 5â€™s until you say 7 numbers. 5, 10, 15, 20, 25, 30, 35. Now, the count of the number is 7. So, the answer for 5 x 7 is 35.

Question 7.

2

Ã— 1 0

——-

______

Answer:

2 x 10 = 20.

Explanation:

Double 10 to get the answer of 2 x 10.

10 + 10 = 20.

2 x 10 = 20.

Question 8.

4

Ã— 5

——-

______

Answer:

4 x 5 =20

Explanation:

Multiply 2Ã—5 to get the answer for 4Ã—5. Double the answer of 2Ã—5 to get the final answer.

2 x 5 =10.

Double: 10 + 10 = 20.

4 x 5 =20.

**Lessons 4.3â€“4.5**

**Find the product.**

Question 9.

6

Ã— 2

——-

______

Answer:

6 x 2 = 12.

Explanation:

Use doubles to find the answer of 6 x 2.

Multiply 3 x 2 = 6.

Double: 6 + 6 = 12.

The answer for 6 x 2 is 12.

Question 10.

3

Ã— 9

——-

______

Answer:

3 x 9 = 27.

Explanation:

Skip count by 3â€™s until you say 9 numbers. Write like 3, 6, 9, 12, 15, 18, 21, 24, 27. The answer for 3 x 9 is 27.

Question 11.

7

Ã— 3

——-

______

Answer:

7 x 3 = 21

Explanation:

Write 7 x 3 as 3 x 7 according to the Commutative Law of Multiplication.

Skip count by 3â€™s until you say 7 numbers. Write like 3, 6, 9, 12, 15, 18, 21. The answer for 3 x 7 is 21. So, 7 x 3 = 21.

Question 12.

8

Ã— 6

——-

______

Answer:

8 Ã— 6 = 48

Explanation:

8 Ã— 6 = (2 x 4) x 6

Use the Associative Property.

8 Ã— 6 = 2 x (4 x 6)

Multiply. 4 Ã— 6

8 Ã— 6 = 2 x 24

Double the product.

8 Ã— 6 = 24 + 24

8 Ã— 6 = 48.

**Write one way to break apart the array. Then find the product.**

Question 13.

Type below:

__________

Answer:

36

Explanation:

Draw a line to seperate the columns. Divide the columns with 4 and 5 factors.

The array is 4 x 9 = 4 x (5 + 4)

(4 x 5) + (4 x 4) = 20 + 16 = 36.

**Find the product.**

Question 14.

5 Ã— 7 = ______

Answer:

5 x 7 = 35

Explanation:

Skip count by 5â€™s until you say 7 numbers. 5, 10, 15, 20, 25, 30, 35. Now, the count of the number is 7. So, the answer for 5 x 7 is 35.

Question 15.

2 Ã— 6 = ______

Answer:

2 x 6 = 12

Explanation:

Double 6 to get the answer. 6 + 6 = 12.

2 x 6 = 12.

Question 16.

4 Ã— 7 = ______

Answer:

Double 2 x 7 to find 4 x 7.

2 x 7 = 14.

Double: 14 + 14 = 28.

4 x 7 = 28.

Explanation:

Question 17.

8 Ã— 3 = ______

Answer:

8 Ã— 3 = 24

Explanation:

8 Ã— 3 = (2 x 4) x 3

Use the Associative Property.

8 Ã— 3 = 2 x (4 x 3)

Multiply. 4 Ã— 3

8 Ã— 3 = 2 x 12

Double the product.

8 Ã— 3 = 12 + 12

8 Ã— 3 = 24.

Question 18.

Abby has 5 stacks of cards with 7 cards in each stack. How many cards does she have in all?

______ cards

Answer:

35 cards

Explanation:

5 x 7 = 35.

Abby has 35 cards.

Question 18.

Noah has 3 sisters. He gave 6 balloons to each sister. How many balloons did Noah give away in all?

______ balloons

Answer:

18 balloons

Explanation:

3 x 6 = 18.

Noah gave 18 balloons to his sisters.

### Common Core – Page No. 88000

**Lesson 4.6**

**Write another way to group the factors. Then find the product.**

Question 1.

(3 Ã— 2) Ã— 5 = ______

Explain:

__________

Answer:

3 Ã— (2 Ã— 5)

30

Explanation:

Using Associative Property of Multiplication, we can write (3 Ã— 2) Ã— 5 = 3 Ã— (2 Ã— 5).

Find (3 Ã— 2) Ã— 5. Multiply 3 x 2 = 6. Then, multiply 6 x 5 = 30.

Find 3 x (2 x 5). Multiply 2 x 5 = 10. Then, multiply 3 x 10 = 30.

So, (3 Ã— 2) Ã— 5 = 3 Ã— (2 Ã— 5). The product value is 30.

Question 2.

2 Ã— (5 Ã— 3) = ______

Explain:

__________

Answer:

(2 x 5) x 3

30

Explanation:

Using the Associative Property of Multiplication, we can write 2 Ã— (5 Ã— 3) = (2 x 5) x 3.

Find 2 Ã— (5 Ã— 3). Multiply 5 x 3 = 15. Then, multiply 2 x 15 = 30.

Find (2 x 5) x 3. Multiply 2 x 5 = 10. Then, multiply 10 x 3 = 30.

So, 2 Ã— (5 Ã— 3) = (2 x 5) x 3. The product value is 30.

Question 3.

(1 Ã— 4) Ã— 2 = ______

Explain:

__________

Answer:

1 x (4 x 2)

Explanation:

Using the Associative Property of Multiplication, we can write (1 Ã— 4) Ã— 2 = 1 x (4 x 2).

Find 1 Ã— (4 Ã— 2). Multiply 4 x 2 = 8. Then, multiply 1 x 8 = 8.

Find (1 x 4) x 2. Multiply 1 x 4 = 4. Then, multiply 4 x 2 = 8.

So, (1 Ã— 4) Ã— 2 = 1 x (4 x 2). The product value is 8.

**Lesson 4.7**

**Is the product even or odd?**

**Write even or odd.**

Question 4.

6 Ã— 6

______

Answer:

Even

Explanation:

6 x 6 = 36. The numbers end with 0, 2, 4, 6, 8 are even numbers. So, 36 is even number. The 6 x 6 is an even number.

Question 5.

2 Ã— 3

______

Answer:

even

Explanation:

Products with 2 as a factor are even.

Question 6.

3 Ã— 9

______

Answer:

odd

Explanation:

The product of two odd numbers is an odd number. The answer is odd. So, 3 x 9 = 27.

**Lessons 4.8â€“4.9**

**Find the product.**

Question 7.

8 Ã— 2 = ______

Answer:

16

Explanation:

Factor 8 is an even number. 4+ 4

2 x 4 = 8.

8 doubled is 16.

8 x 2 = 16.

Question 8.

5 Ã— 9 = ______

Answer:

5 Ã— 9 = 45

Explanation:

The multiplication of 5 Ã— 9 is calculated as Skip-count by 5â€™s 9 times. You can write as 5, 10, 15, 20, 25, 30, 35, 40, 45. The final answer for 5 Ã— 9 is 45.

Question 9.

______ = 3 Ã— 9

Answer:

27 = 3 x 9

Explanation:

Skip count by 3â€™s until you say 9 numbers. Write like 3, 6, 9, 12, 15, 18, 21, 24, 27. The answer for 3 x 9 is 27.

Question 10.

4 Ã— 8 = ______

Answer:

2 Ã— 5 = 10

Explanation:

Double 2Ã—8 to get 4Ã—8.

2 x 8 = 16.

16 + 16 = 32.

4 x 8 = 32.

Question 11.

______ = 9 Ã— 4

Answer:

36

Explanation:

9 = 3 + 6

9 Ã— 4 = (3 + 6) x 4

Multiply each addend by 4.

9 Ã— 4 = (3 x 4) + (6 x 4)

Add the products.

9 Ã— 4 = 12 + 24

9 Ã— 4 = 36.

Question 12.

6 Ã— 8 = ______

Answer:

48

Explanation:

Use doubles to find the answer of 6 x 8. Firstly, multiply 3 x 8 = 24. Then, double the value of 3 x 8. 24 + 24 = 48. The answer for 6 x 8 is 48.

**Lesson 4.10**

Question 13.

Leo has a total of 45Â¢. He has some dimes and pennies. How many different combinations of dimes and pennies could Leo have? Make a table to solve.

Leo could have ______ combinations of 45Â¢.

Answer:

Leo could have 4 combinations of 45Â¢.

Explanation:

1 dime 35 pennies

2 dimes 25 pennies

3 dimes 15 pennies

4 dimes 5 pennies.

Question 13.

Number of Dimes | ____1_____ | _____2____ | ___3______ | _____4____ |

Number of Pennies | ____35_____ | _____25____ | ___15______ | ______5___ |

Total Value | 45Â¢ | 45Â¢ | 45Â¢ | 45Â¢ |

### Conclusion

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