Refer to our Texas Go Math Grade 3 Answer Key Pdf to score good marks in the exams. Test yourself by practicing the problems from Texas Go Math Grade 3 Lesson 8.1 Answer Key Multiply with 7.

## Texas Go Math Grade 3 Lesson 8.1 Answer Key Multiply with 7

**Essential Question**

What strategies can you use to multiply with 7?

**Unlock the Problem**

Logan’s family has a new puppy. Logan takes a turn walking the puppy once a day. How many times will Logan walk the puppy in 4 weeks?

Find 4 × 7.

• How often does Logan walk the puppy?

Answer:

Logan takes a turn walking the puppy once a day.

Explanation:

Logan takes a turn walking the puppy once a day.

• How many days are in 1 week?

Answer:

There are 7 days a week.

Explanation:

Number of days in a week = 7.

**One Way**

Use the Commutative Property of Multiplication.

If you know 7 × 4, you can use that fact to find 4 × 7.

You can change the order of the factors and the product is the same.

7 × 4 = ___, so, 4 × 7 = ___.

so, Logan will walk the puppy __ times in 4 weeks.

**Math Talk**

**Mathematical Processes**

Explain two other ways you can break apart the 4 × 7 array.

Answer:

One way:

4 × 7 = (2 × 7) + ( 2× 7) = 28.

Other way:

(4 × 3) + (4 × 4) = 28.

Explanation:

One way:

4 × 7 = (2 × 7) + ( 2× 7) = 14 + 14 = 28.

Other way:

(4 × 3) + (4 × 4) = 12 + 16 = 28.

**Other Ways**

**A. Use the Distributive Property.
**Step 1

Complete the array to show 4 rows of 7.

Step 2

Draw a line to break the array into two smaller arrays for facts you know.

Step 3

Multiply the facts for the smaller arrays. Add the products.

So, 4 × 7 = ___.

**B. Use a fact you know.**

Multiply. 4 × 7 = ___

**Share and Show**

Question 1.

Explain how you could break apart an array to find 6 × 7. Draw an array to show your work.

Answer:

6 × 7 = (3 × 7) + (2 × 7) + (1 × 7) = 42.

Explanation:

6 × 7 = (3 × 7) + (2 × 7) + (1 × 7)

= 21 + 14 + 7

= 35 + 7

= 42.

**Math Talk**

**Mathematical Processes**

How can you use doubles to find 8 × 7 ?

Answer:

Doubles to find 8 × 7:

(2 × 7) + (2 × 7) + (2 × 7) + (2 × 7)

= 14 + 14 + 14 + 14

= 28 + 14 + 14

= 42 + 14

= 56.

Explanation:

Doubles to find 8 × 7:

2 × 7 = 14.

**Find the product.**

Question 2.

9 × 7 = ___

Answer:

9 × 7 = 63.

Explanation:

9 × 7 = 63.

Question 3.

___ = 5 × 7

Answer:

35 = 5 × 7.

Explanation:

Question 4.

___ = 7 × 3

Answer:

21= 7 × 3.

Explanation:

7 × 3 = 21.

Question 5.

8 × 7 = ___

Answer:

8 × 7 = 56.

Explanation:

8 × 7 = 56.

Question 6.

___ = 7 × 7

Answer:

49 = 7 × 7

Explanation:

7 × 7 = 49.

Question 7.

6 × 7 = ___

Answer:

6 × 7 = 42.

Explanation:

6 × 7 = 42.

Question 8.

___ = 7 × 10

Answer:

70 = 7 × 10

Explanation:

7 × 10 = 70.

Question 9.

___ = 7 × 2

Answer:

14 = 7 × 2

Explanation:

7 × 2 = 14.

Question 10.

Answer:

Explanation:

7 × 3 = 21.

Question 11.

Answer:

Explanation:

6 × 7 = 42.

Question 12.

Answer:

Explanation:

9 × 7 = 63.

Question 13.

Answer:

Explanation:

8 × 7 = 56.

Question 14.

Answer:

Explanation:

1 × 7 = 7.

Question 15.

Answer:

Explanation:

4 × 7 = 28.

Question 16.

Answer:

Explanation:

10 × 4 = 40.

Question 17.

Answer:

Explanation:

0 × 7 = 0.

Question 18.

Answer:

Explanation:

2 × 7 = 14.

Question 19.

Answer:

Explanation:

5 × 7 = 35.

Question 20.

Answer:

Explanation:

6 × 9 = 54.

Question 21.

Answer:

Explanation:

7 × 8 = 56.

**Problem Solving
**

**Use the table for 22-24.**

Question 22.

Olivia has a dog named Rusty. How many baths will Rusty have in 7 months?

Answer:

Number of times Rusty takes bath in a 7 months = 14.

Explanation:

Number of times Rusty takes bath in a month = 2.

Number of times Rusty takes bath in a 7 months = 7 × Number of times Rusty takes bath in a month

= 7 × 2

= 14 times.

Question 23.

**H.O.T. Multi-Step** How many more cups of water than food will Rusty get in 1 week?

Answer:

7 more cups of water than food will Rusty get in 1 week.

Explanation:

Number of cups of water Rusty takes in a day = 4.

Conversion: 1 Week = 7 days.

=> Number of cups of water Rusty takes in a week = 7 × Number of cups of water Rusty takes in a day

= 7 × 4

= 28.

Number of cups of food Rusty takes in a day = 3.

=> Number of cups of food Rusty takes in a week = 7 × Number of cups of food Rusty takes in a day

= 7 × 3

= 21.

Difference:

Number of cups of water Rusty takes in a week – Number of cups of food Rusty takes in a week

= 28 – 21

= 7.

Question 24.

**H.O.T. Write Math** Jacob’s dog Midnight eats 28 cups of food in a week. Midnight eats the same amount each day. In one day, how many more cups of food will Midnight eat than Rusty? Explain.

Answer:

25 more cups of food will Midnight eat than Rusty.

Explanation:

Number of cups of food Jacob’s dog Midnight eats = 28.

Number of cups of food Rusty takes in a day = 3.

Difference:

Number of cups of food Jacob’s dog Midnight eats – Number of cups of food Rusty takes in a day

= 28 – 3

= 25.

Question 25.

Jose walks his dog 10 miles every week. How many miles do they walk in 7 weeks?

Answer:

Number of miles Jose walks his dog in 7 weeks = 70.

Explanation:

Number of miles every week Jose walks his dog = 10.

Conversion:

1 Week = 7 days.

=> Number of miles Jose walks his dog in 7 weeks = 7 × Number of miles every week Jose walks his dog

= 7 × 10

= 70.

Question 26.

**Multi-Step Apply** Ethan takes his dog Zoey for a 3-mile walk twice a day. How many miles do they walk in one week?

Answer:

Number of miles they walk in one week = 42.

Explanation:

Number of miles Zoey walks a day = 3.

Number of times Zoey walks a day = 2.

Total number of miles Zoey walks a day = Number of miles Zoey walks a day × Number of times Zoey walks a day

= 3 × 2

= 6.

Conversion:

1 Week = 7 days.

Number of miles they walk in one week = 7 × Total number of miles Zoey walks a day

= 7 × 6

= 42.

**Daily Assessment Task
**

**Fill in the bubble for the correct answer choice.**

Question 27.

Sebastian the Sailor sails the Seven Seas. He drops 5 gold coins into each sea for good luck. How many gold coins does Sebastian the Sailor drop into the seas?

(A) 45

(B) 35

(C) 25

(D) 75

Answer:

Number of gold coins Sebastian the Sailor drops into the seas = 35.

(B) 35.

Explanation:

Number of seas Sebastian the Sailor sails = 7.

Number of gold coins into each sea for good luck = 5.

Number of gold coins Sebastian the Sailor drops into the seas = Number of seas Sebastian the Sailor sails × Number of gold coins into each sea for good luck

= 7 × 5

= 35.

Question 28.

Emilia makes 7 huge sandwiches for the class picnic. She uses 3 slices of bread in each sandwich. How many slices of bread does Emilia use for the sandwiches?

(A) 10

(B) 18

(C) 21

(D) 14

Answer:

Number of slices of bread Emilia uses for the sandwiches = 21.

(C) 21.

Explanation:

Number of huge sandwiches for the class picnic Emilia makes = 7.

Number of slices of bread in each sandwich = 3.

Number of slices of bread Emilia uses for the sandwiches = Number of huge sandwiches for the class picnic Emilia makes × Number of slices of bread in each sandwich

= 7 × 3

= 21.

Question 29.

**Multi-Step** Anders makes 7 fruit cups. He puts 2 green grapes, 2 red grapes, and 2 black grapes in each fruit cup. How many grapes does Anders use for the fruit cups?

(A) 42

(B) 28

(C) 13

(D) 14

Answer:

Number of grapes Anders uses for the fruit cups = 42.

(A) 42

Explanation:

Number of fruit cups Anders makes = 7.

Number of green grapes he puts = 2.

Number of red grapes he puts = 2.

Number of black grapes he puts = 2.

Number of grapes Anders uses for the fruit cups = Number of fruit cups Anders makes(Number of green grapes he puts + Number of red grapes he puts + Number of black grapes he puts)

= 7(2 + 2 + 2)

= 7(4 + 2)

= 7 × 6

= 42.

**Texas Test Prep**

Question 30.

Madison walks her dog 4 miles a day. How many miles does she walk in one week?

(A) 5 miles

(B) 32 miles

(C) 28 miles

(D) 11 miles

Answer:

Number of miles does she walk in one week = 28.

(C) 28 miles.

Explanation:

Number of miles Madison walks her dog a day = 4.

Conversion:

1 week = 7 days.

Number of miles does she walk in one week = 7 × Number of miles Madison walks her dog a day

= 7 × 4

= 28.

### Texas Go Math Grade 3 Lesson 8.1 Homework and Practice Answer Key

**Find the product.**

Question 1.

6 × 7 = ___

Answer:

6 × 7 = 42.

Explanation:

6 × 7 = 42.

Question 2.

10 × 7 = ___

Answer:

10 × 7 = 70.

Explanation:

10 × 7 = 70.

Question 3.

7 × 3 = ___

Answer:

7 × 3 = 21.

Explanation:

7 × 3 = 21.

Question 4.

7 × 9 = ___

Answer:

7 × 9 = 63.

Explanation:

7 × 9 = 63.

Question 5.

2 × 7 = ___

Answer:

2 × 7 = 14.

Explanation:-

2 × 7 = 14.

Question 6.

1 × 7 = ___

Answer:

1 × 7 = 7.

Explanation:

1 × 7 = 7.

Question 7.

Answer:

Explanation:

5 × 7 = 35.

Question 8.

Answer:

Explanation:

7 × 4 = 28.

Question 9.

Answer:

Explanation:

0 × 7 = 0.

Question 10.

Answer:

Explanation:

8 × 7 = 56.

Question 11.

Answer:

Explanation:

7 × 7 = 49.

Question 12.

Answer:

Explanation:

7 × 6 = 42.

**Use the table for 13-15.**

Question 13.

How many pails of food do the elephants eat in one week?

Answer:

Number of pails of food elephant eats in a week = 63.

Explanation:

Number of pails of food elephant eats in a day = 9.

Number of days in a week = 7.

Number of pails of food elephant eats in a week = Number of days in a week × Number of pails of food elephant eats in a day

= 7 × 9

= 63.

Question 14.

If the zoo keepers increased the lion’s feed by 2 pails, how many pails of food would the lions eat in one week?

Answer:

Number of pails of food would lion eats in a week = 56.

Explanation:

Number of pails of food lion eats in a day = 4.

Number of days in a week = 7.

Number of pails of food lion eats in a week = Number of days in a week × Number of pails of food lion eats in a day

= 7 × 4

= 28.

If the zoo keepers increased the lion’s feed by 2 pails.

=> Number of pails of food would lion eats in a week = 2 × Number of pails of food lion eats in a week

= 2 × 28

= 56.

Question 15.

How many more pails of food do the zebras eat in one week than the lions?

Answer:

21 more pails of food do the zebras eat in one week than the lions.

Explanation:

Number of pails of food lion eats in a week = 28.

Number of pails of food zebra eats in a day = 7.

Number of days in a week = 7.

Number of pails of food zebra eats in a week = Number of days in a week × Number of pails of food zebra eats in a day

= 7 × 7

= 49.

Difference:

Number of pails of food zebra eats in a week – Number of pails of food lion eats in a week

= 49 – 28

= 21.

**Problem Solving
**Question 16.

Mark works 3 hours each day feeding the animals and 4 hours in the zoo store. How many hours does Mark work in 5 days? Explain.

Answer:

Number of hours Mark work in 5 days = 35.

Explanation:

Number of hours each day feeding the animals Mark works = 3.

Number of hours each day in the zoo store Mark works = 4.

Number of days = 5.

Number of hours Mark work in 5 days = Number of days (Number of hours each day feeding the animals Mark works + Number of hours each day in the zoo store Mark works)

= 5 (3 + 4)

= 5 × 7

= 35.

**Texas Test Prep
**

**Lesson Check**

Question 17.

Sudi serves pancakes at the town picnic. He puts 3 pancakes on each of 7 plates. How many pancakes does Sudi serve?

(A) 10

(B) 21

(C) 28

(D) 20

Answer:

Number of pancakes Sudi serve = 21.

(B) 21.

Explanation:

Number of pan cakes he puts on each plate = 3.

Number of plates = 7.

Number of pancakes Sudi serve = Number of pan cakes he puts on each plate × Number of plates

= 3 × 7

= 21.

Question 18.

Rosa buys 3 books and 4 magazines. Each one costs $4. How much does Rosa spend on books and magazines?

(A) $28

(B) $11

(C) $12

(D) $24

Answer:

Amount of money Rosa spend on books and magazines = $28.

(A) $28.

Explanation:

Number of books Rosa buys = 3.

Number of magazines Rosa buys = 4.

Cost of each = $4.

Amount of money Rosa spend on books and magazines = Cost of each ( Number of books Rosa buys + Number of magazines Rosa buys)

= $4 (3 + 4)

= $4 × 7

= $28.

Question 19.

Non uses 9 yards of yarn to make a cat toy. 1f she makes 7 toys, how many yards of yarn does Non need?

(A) 72 yards

(B) 16 yards

(C) 63 yards

(D) 56 yards

Answer:

Number of yards of yarn Non need = 63.

(C) 63 yards.

Explanation:

Number of yards of yarn to make a cat toy Non uses = 9.

Number of toys she makes = 7.

Number of yards of yarn Non need = Number of yards of yarn to make a cat toy Non uses × Number of toys she makes

= 9 × 7

= 63.

Question 20.

One trip on a sky ride at the zoo takes 8 minutes. How many minutes does the ride take for 7 trips?

(A) 42 minutes

(B) 49 minutes

(C) 15 minutes

(D) 56 minutes

Answer:

Number of minutes the ride take for 7 trips = 56.

(D) 56 minutes.

Explanation:

Number of minutes one trip on a sky ride at the zoo takes = 8.

Number of trips = 7.

Number of minutes the ride take for 7 trips = Number of trips × Number of minutes one trip on a sky ride at the zoo takes

= 7 × 8

= 56.

Question 21.

**Multi-Step** An album holds 6 photos on one page. A second album holds 4 photos on a page. If Nick fills 7 pages in each album, how many photos does Nick have in all?

(A) 28

(B) 70

(C) 42

(D) 17

Answer:

Number of photos Nick have in all = 70.

(B) 70.

Explanation:

Number of photos on one page an album holds = 6.

Number of photos on one page an second album holds = 4.

If Nick fills 7 pages in each album.

=> Number of photos Nick have in all = 7 (Number of photos on one page an album holds + Number of photos on one page an second album holds)

= 7(6 + 4)

= 7 × 10

= 70.

**Multi-Step** Alexander makes a tile design with 3 red tiles, 1 yellow tile and 3 purple tiles. If he makes 5 designs, how many tiles does Alexander need in all?

(A) 30

(B) 18

(C) 35

(D) 12

Answer:

Number of tiles does Alexander need in all = 35.

(C) 35.

Explanation:

Number of red tiles Alexander makes a tile design with = 3.

Number of yellow tiles Alexander makes a tile design with = 1.

Number of purple tiles Alexander makes a tile design with = 3.

Number of designs he makes = 5.

Number of tiles does Alexander need in all = Number of designs he makes (Number of red tiles Alexander makes a tile design with + Number of yellow tiles Alexander makes a tile design with + Number of purple tiles Alexander makes a tile design with)

= 5 (3 + 1 + 3)

= 5 (4 + 3)

= 5 × 7

= 35.