Refer to our Texas Go Math Grade 4 Answer Key Pdf to score good marks in the exams. Test yourself by practicing the problems from Texas Go Math Grade 4 Lesson 8.4 Answer Key Area Models and Partial Products.

## Texas Go Math Grade 4 Lesson 8.4 Answer Key Multiply Using Partial Products

**Essential Question**

How can you use place value and partial products to multiply 2-digit numbers?

Answer:

Multiplying 2-digits by 1-digit with partial products.

We can multiply 2-digit numbers by multiplying and by finding each partial products such as the tens and ones separately, then add all partial products together.

**Unlock the Problem**

Connect You know how to break apart a model to find partial products. How can you use what you know to find and record a product?

Answer:

You multiply in parts:

first the ones, then the tens,

then the hundreds. Lastly, add to get the product.

Multiply. 34 × 57 Estimate. 30 × 60 = _1800_

Explanation:

So, 34 × 57 = 1,938. Since 1,938 is close to the estimate of 1,800, it is reasonable.

**Math Talk**

Mathematical Processes

You can write 10 × 4 ones = 40 ones as 10 × 4 = 40. What is another way to write 10 × 3 tens = 30 tens?

Answer:

10 x 4 = 40

10 x 3 = 30

Explanation:

Multiplying each partial products such as the tens and ones separately, then add all partial products together.

So, 10 × 3 tens = 30 tens

10 x 3 = 30

**Share and Show**

Question 1.

Find 24 × 34.

Answer: 816

Explanation:

20 x 30 = 600

20 x 4 = 80

30 x 4 = 120

4 x 4 = 16

Total = 816

24 x 34 = 816

**Record the product.**

Question 2.

Answer: 144

Explanation:

10 x 10 = 100

10 x 2 = 20

2 x 10 = 20

2 x 2 = 4

100 + 20 + 20 + 4 = 144

Question 3.

Answer: 744

Explanation:

30 x 20 = 600

20 x 1 = 20

30 x 4 = 120

1 x 4 = 4

600 + 120 + 20 + 4 =744

Question 4.

Answer: 1,075

Explanation:

800 + 200 + 60 + 15 = 1075

Question 5.

Answer: 962

Explanation:

600 + 180 + 140 + 42 = 962

**Math Talk**

Mathematical Processes

Explain how to model and record 74 × 25.

Answer: 1850

Explanation:

**Problem Solving**

**Practice: Copy and Solve Record the product.**

Question 6.

38 × 47

Answer: 1,786

Explanation:

Question 7.

46 × 27

Answer: 1,242

Explanation:

Question 8.

72 × 53

Answer: 3,816

Explanation:

Question 9.

98 × 69

Answer: 6,762

Explanation:

Question 10.

53 × 68

Answer: 3,604

Explanation:

Question 11.

76 × 84

Answer: 6,384

Explanation:

Question 12.

92 × 48

Answer: 4,416

Explanation:

Question 13.

37 × 79

Answer: 2,923

Explanation:

**H.O.T. Algebra** Find the unknown digits. Complete the problem.

Question 14.

Answer:

76 x 24 = 1824

Explanation:

Question 15.

Answer:

82 x 97 = 7954

Explanation:

Question 16.

Answer:

36 x 53 = 1908

Explanation:

Question 17.

Answer:

34 x 28 = 952

Explanation:

**Problem Solving**

**Use the pictograph for 18-20**

Question 18.

Use Graphs A fruit-packing warehouse is shipping 15 boxes of grapefruit to a store in St. Louis, Missouri. What is the total weight of the shipment?

Answer:

1,275 pounds.

Explanation:

A fruit-packing warehouse is shipping 15 boxes of grapefruit to a store.

1 box = 10 x 8.5 = 1,275 pounds.

The total weight of the shipment

15 x 85 = 150

Question 19.

How much less do 13 boxes of tangelos weigh than 18 boxes of tangerines?

Answer:

Tangelos weighs 540 pounds less than Tangerines.

Explanation:

1 box of tangelos contain 9 fruits.

Weight of 1 box tangelos = 9 x 10 = 90 pounds

Weight of 13 boxes tangelos = 13 x 90 = 1,170 pounds

1 box of tangerines contain 9.5 fruits.

Weight of 1 box tangerines = 9.5 x 10 = 95 pounds

Weight of 18 boxes of tangerines = 18 x 95 = 1,710

tangerines – tangelos = 1,710 – 1,170 = 540

So, tangelos weighs 540 pounds less than tangerines.

Question 20.

What is the weight of 12 boxes of oranges?

Answer:

1,080 pounds

Explanation:

Each box of oranges contain 9 fruits.

1 box of orange weighs = 9 x 10 = 90 pounds

Weight of 12 boxes of oranges = 90 x 12 = 1,080 pounds.

Question 21.

**H.O.T.** Each person in the United States eats about 65 fresh apples each year. Based on this estimate, how many apples do 3 families of 4 eat each year?

Answer:

780 apples.

Explanation:

Each person in the United States eats about 65 fresh apples each year.

Based on this estimate, number of apples do 3 families of 4 eat each year

3 x 4 = 12 members

Each person eats 65 apples.

So, 12 members eats = 12 x 65 = 780 apples

Question 22.

**H.O.T. Multi-Step** Martin has 14 packages to ship. Each package weighs 11 pounds. After shipping those 14 packages, he shipped 13 other packages that each weighed 27 pounds. How many pounds of packages did Martin ship? Explain.

Answer:

505 pounds.

Explanation:

Martin has 14 packages to ship.

Each package weighs 11 pounds.

14 x 11 = 154 pounds

After he shipped 13 other packages that each weighed 27 pounds.

13 x 27 = 351 pounds

Total pounds of packages Martin shipped

154 + 351 = 505 pounds.

Question 23.

Use Math Language The product of 26 × 93 is more than 25 × 93. How much more? Explain how you know without multiplying.

Answer:

26 is 1 more than 25,

So, the difference is 93.

Explanation:

The product of 26 x 93 = 2,418

The product of 25 x 93 = 2,325

The difference between these two products = 93

**Daily Assessment Task**

**Fill in the bubble completely to show your answer.**

Question 24.

A builder is clearing more land. He clears one strip that is 32 feet wide. He needs 28 of these strips cleared. How many feet wide will the cleared land be?

(A) 840 feet

(B) 880 feet

(C) 856 feet

(D) 896 feet

Answer:

Option(D)

Explanation:

A builder clears one strip that is 32 feet wide.

He needs 28 of these strips cleared.

Total feet wide the cleared land be

32 x 28 = 896 feet

Question 25.

Students line up in equal rows for a school picture. There are 41 rows of 16 students. How many students are in the school picture?

(A) 640 students

(B) 656 students

(C) 650 students

(D) 646 students

Answer:

Option(B)

Explanation:

There are 41 rows of 16 students.

Number of students in the school picture

41 x 16 = 656 students

Question 26.

**Multi-Step** Mrs. Parker sells 18 boxes of 45 oranges at the Farmers’ Market. She sells 16 boxes of 52 lemons. How many more lemons than oranges does Mrs. Parker sell?

(A) 22 more lemons

(B) 50 more lemons

(C) 42 more lemons

(D) 20 more lemons

Answer:

Option(A)

Explanation:

Mrs. Parker sells 18 boxes of 45 oranges at the Farmers’ Market.

Total oranges 18 x 45 = 810

She sells 16 boxes of 52 lemons.

Total lemons 16 x 52 = 832

832 – 810 = 22

22 lemons are more than oranges.

**TEXAS Test Prep**

Question 27.

Each row of apple trees has 14 trees. There are 16 rows. How many apple trees are there?

(A) 1,340

(B) 224

(C) 184

(D) 124

Answer:

Option(B)

Explanation:

Each row of apple trees has 14 trees

There are 16 rows.

Number of apple trees 14 x 16 = 224

### Texas Go Math Grade 4 Lesson 8.4 Homework and Practice Answer Key

**Record the product.**

Question 1.

Answer: 225

Explanation:

Question 2.

Answer: 806

Explanation:

Question 3.

Answer: 2,214

Explanation:

Question 4.

Answer: 4,752

Explanation:

**Find the unknown digits. Complete the problem.**

Question 5.

Answer:

Question 6.

Answer:

Question 7.

Answer:

Question 8.

Answer:

**Problem Solving**

**Use the pictograph for 9 – 12.**

Question 9.

Pet Center ordered 75 bags of training treats. How many pounds did Pet Center order?

Answer: 1,500 pounds

Explanation:

Pet Center ordered 75 bags of training treats.

Each bag contain 2 training treats and each weighs10 pounds.

So, 2 x 10 = 20 pounds

Total pounds Pet Center order

75 x 20 = 1,500 pounds

Question 10.

What is the weight of 45 bags of grain free dog food?

Answer: 1,350 pounds

Explanation:

Grain free bag has 3 dogs food and each weighs 10 pounds.

So, 3 x 10 = 30 pounds.

The weight of 45 bags of grain free dog food = 45 x 30 = 1,350 pounds

Question 11.

The animal shelter bought 28 bags of puppy food and 36 bags of adult dog food. What is the total weight of their order?

Answer: 2,280 pounds

Explanation:

The animal shelter bought 28 bags of puppy food 28 x 3 x 10 = 840 pounds

36 bags of adult dog food 36 x 4 x 10 = 1,440 pounds

Total weight of their order 1,440 + 840 = 2,280 pounds.

Question 12.

A warehouse shipped 68 bags of adult dog food and 45 bags of grain free dog food. How many more pounds of adult dog food did they ship?

Answer: 1,370 pounds

Explanation:

A warehouse shipped 68 bags of adult dog food

68 x 4 x 10 = 2,720 pounds

A ware house shipped 45 bags of grain free dog food.

45 x 3 x 10 = 1,350 pounds

Number of more pounds of adult dog food they shipped

2,720 – 1,350 = 1,370 pounds

**Lesson Check**

**Fill in the bubble completely to show your answer.**

Question 13.

A farmer bought 19 bags of chicken feed. Each bag costs $57. I low much does the farmer pay for the chicken feed?

(A) $1064

(B) $1,074

(C) $1,023

(D) $1,083

Answer:

Option (D)

Explanation;

A farmer bought 19 bags of chicken feed.

Each bag costs $57.

Total amount the farmer paid for the chicken feed

19 x 57 = $1,083

Question 14.

Visitors at a petting zoo are given food to feed the ducks. A 50-pound hag of duck food costs $71. The zoo needs 44 bags of food for the summer months. How much does the duck food cost for the summer?

(A) $3,550

(B) $2,200

(C) $3,124

(D) $2,024

Answer:

Option(C)

Explanation:

A 50-pound bag of duck food costs $71.

The zoo needs 44 bags of food for the summer months.

Cost of the duck food for the summer

44 x 71 = $3,124

Question 15.

Large flower pots weigh 28 pounds each. One crate holds 35 pots. What is the weight of one crate of flower pots?

(A) 780 pounds

(B) 980 pounds

(C) 940 pounds

(D) 920 pounds

Answer:

Option (B)

Explanation:

Large flower pots weigh 28 pounds each.

One crate holds 35 pots.

The weight of one crate of flower pots

28 x 35 = 980 pounds

Question 16.

Multi-Step A store sells drinks in cartons of 6 each. Bonnie bought 2 cartons of lemonade and 2 cartons of fruit juice. Each bottle is 32 ounces. How many ounces did Bonnie buy?

(A) 560 ounces

(B) 42 ounces

(C) 840 ounces

(D) 768 ounces

Answer:

Option(D)

Explanation:

A store sells drinks in cartons of 6 each.

Bonnie bought 2 cartons of lemonade and 2 cartons of fruit juice.

Total cartons he bought 2 + 2 = 4

Each bottle is 32 ounces.

Each carton has 6 bottles = 32 x 6 = 192 ounces

Number of ounces Bonnie bought in all

192 x 4 = 768 ounces

Question 17.

**Multi-Step** Twelve adults and 63 students are going on a field trip to the aquarium. Tickets cost $18 for adults and $15 for students. What is the total cost of the tickets?

(A) $1,350

(B) $1,125

(C) $1,161

(D) $1,314

Answer:

Option(C)

Explanation:

Twelve adults and 63 students are going on a field trip to the aquarium.

Tickets cost $18 for adults 12 x 18 = $216

Ticket cost $15 for students, 15 x 63 = $945

The total cost of the tickets 945 + 216 = $1,161

Question 18.

**Multi-Step** A bus company sold 39 one-way tickets and 20 round-trip tickets from West Elmwood to East Elmwood. One-way tickets cost $14. Round trip tickets cost $25. How much money did the bus company collect?

(A) $1,046

(B) S1,255

(C) $916

(D) $946

Answer:

Option(D)

Explanation:

A bus company sold 39 one-way tickets and 20 round-trip tickets from West Elmwood to East Elmwood.

One-way tickets cost $14; 39 x 14 = $546

Round trip tickets cost $25; 20 x 25 = $500

Total money collected by the bus company

$546 + $500 = $946