Practicing the **Bridges in Mathematics Grade 2 Home Connections Answer Key Unit 8 Module 1** will help students analyze their knowledge of concepts.

## Bridges in Mathematics Grade 2 Home Connections Answer Key Unit 8 Module 1

**Bridges in Mathematics Grade 2 Home Connections Unit 8 Module 1 Session 1 Answer Key**

**Estimation Problems**

Question 1.

For each problem below, circle the estimate you think is best. On the last two, explain why you chose the estimate you did. Hint: Make your own pictures to help.

Answer:

Explanation:

Drawn a circle for the estimation I think is best as we can observe in the above image.

Question 2.

For each problem below, circle the estimate you think is best. On the last two, explain why you chose the estimate you did. Hint: Make your own pictures to help.

Answer:

Explanation:

Drawn a circle for the estimation I think is best as we can observe in the above image.

Question 3.

Dora went to the mall yesterday. She got a T-shirt for $9.99 and a new CD for $6.99. About how much money did she spend in all? Circle the estimate you think is best.

$15.00

$16.00

$17.00

$20.00

Answer:

Explanation:

She got a T-shirt for $9.99 and a new CD for $6.99.

Estimation:

Round T-shirt cost $9.99 to $10.

Round CD cost $6.99 to $7.00.

Add Rounded T-shirt cost and CD cost.

$10 + $7 = $17.

She spends about $17 in all.

So drawn a circle for the $17 as we can observe in the above image.

Question 4.

Max got $50.00 for his birthday. He bought 2 video games for $14.00 each. About how much money does he have left? Circle the estimate you think is best.

$10.00

$20.00

$30.00

$40.00

Answer:

Explanation:

Max got $50.00 for his birthday. He bought 2 video games for $14.00 each.

Estimation:

The cost of two video games$14.00 is rounded to $15.00 each.

Add two video games cost.

$15.00 + $15.00 = $30.00

The cost of two video games is about $30.00.

So, Max left with about $20.

So drawn a circle for the $20 as we can observe in the above image.

Question 5.

Janel is making a quilt. She needs 100 squares of fabric in all. She cut 29 squares this morning and 39 more squares this afternoon. About how many squares does she have left to cut? Circle the estimate you think is best.

10 squares

20 squares

30 squares

40 squares

Answer:

Explanation:

Janel needs 100 squares of fabric in all.

She cut 29 squares this morning and 39 more squares this afternoon.

Estimation:

29 squares are rounded to 30 squares.

39 squares are rounded to 40 squares.

Add 30 squares with 40 squares the sum is equal to 70 squares.

30 + 40 = 70

She cuts about 70 squares total.

Subtract 70 from 100 squares the difference is 30 squares.

100 – 70 = 30 squares

She left to cut about 30 squares.

So drawn a circle for the 30 squares as we can observe in the above image.

Question 6.

Gerald wants to read 75 books by the end of the year. So far, he has read 18 fantasy books and 21 science books. About how many books does he have left to read? Circle the estimate you think is best.

15 books

25 books

35 books

45 books

Answer:

Explanation:

Gerald wants to read 75 books by the end of the year.

So far, he has read 18 fantasy books and 21 science books.

Estimation:

Round 18 fantasy books to 20 books.

Round 21 science books to 20 books

20 + 20 = 40 books

He read about 40 books.

Subtract 40 books from 75 books the difference is equal to 35 books.

75 – 40 = 35 books

He left to read about 35 books.

So drawn a circle for the 35 books as we can observe in the above image.

Question 7.

The second graders at King School are recycling cans.

About how many cans have they recycled so far? Circle the estimate you think is best.

200 cans

300 cans

400 cans

1,000 cans

Answer:

Explanation:

Round 57 cans to 55 cans.

Round 98 cans to 95 cans.

55 + 95 + 45 + 105 = 300

They recycled so far about 300 cans.

So drawn a circle for the 300 cans as we can observe in the above image.

**Bridges in Mathematics Grade 2 Home Connections Unit 8 Module 1 Session 3 Answer Key**

**Riddles & Toys**

Question 1.

Tell what digit is in each place.

a. 289

____________ is in the tens place.

____________ is in the ones place.

____________ is in the hundreds place.

Answer:

**8** is in the tens place.

**9 **is in the ones place.

**2 **is in the hundreds place.

b. 945

____________ is in the ones place.

____________ is in the hundreds place.

____________ is in the tens place.

Answer:

**5** is in the ones place.

**9** is in the hundreds place.

**4** is in the tens place.

c. 316

____________ is in the tens place.

____________ is in the hundreds place.

____________is in the ones place.

Answer:

**1** is in the tens place.

**3** is in the hundreds place.

**6** is in the ones place.

d. 405

____________ is in the ones place.

____________ is in the tens place.

____________ is in the hundreds place.

Answer:

**5** is in the ones place.

**0** is in the tens place.

**4** is in the hundreds place.

e. 5,687

____________ is in the tens place.

____________ is in the ones place.

____________ is in the thousands place.

____________ is in the hundreds place.

Answer:

**8** is in the tens place.

**7** is in the ones place.

**5 **is in the thousands place.

**6 **is in the hundreds place.

f. 4,301

____________ is in the ones place.

____________ is in the hundreds place.

____________ is in the tens place.

____________ is in the thousands place.

Answer:

**1** is in the ones place.

**3** is in the hundreds place.

**0** is in the tens place.

**4** is in the thousands place.

Question 2.

**CHALLENGE** Solve these number riddles.

I have a 4 in the tens place.

I have a 1 in the hundreds place.

The number in my ones place is more than 6 and less than 9.

I am an odd number.

What number am I? _______________

I have a 7 in the hundreds place.

I have a 0 in the tens place.

I have a 3 in the thousands place.

The number in my ones place is less than 3.

I am an even number.

What number am I? _______________

Answer:

The number in tens place is 4.

The number in hundreds place is 1.

The number in one’s place is more than 6 and less than 9.

The numbers more than 6 and less than 9 are 7,8.

The number is odd number. So, the number in one’s place is **7**.

I am number **147. **

The number in hundreds place is 7.

The number in tens place is 0.

The number in thousands place is 3.

The number in one’s place is less than 3.

The numbers less than 3 are 2, 1, 0.

The number is even number. So, the number in one’s place is **2**.

I am number **3702. **

Question 3.

Ezra got $50.00 for his birthday. He bought a hat at the toy store. How much money did he have left? Show your work. Mark the answer clearly.

Answer:

Ezra got $50.00 for his birthday.

He bought a hat at the toy store.

The cost of hat is $13.00.

Subtract $13.00 from $50.00 the difference is equal to $37.00.

$50.00 – $13.00 = $37.00

Ezra left with **$37.00 **after he bought a hat at the toy store.

Question 4.

**CHALLENGE** Maya went into the toy store with $50.00. She bought three different toys and got $2.00 back in change. Which three toys did she buy? Show your work. Mark the answer clearly.

Answer:

Maya went into the toy store with $50.00.

She bought three different toys and got $2.00 back in change.

She bought Skates which costs $29.00.

She bought puppet which costs $6.00.

She bought hat which costs $13.00.

$50.00 – $29.00 – $6.00 – $13.00 = $2.00

She bought Skates, puppet and hat.

**Bridges in Mathematics Grade 2 Home Connections Unit 8 Module 1 Session 5 Answer Key**

**Comparing Numbers & Sharks’ Lengths**

Question 1.

Circle the place value of the underlined digit. Then write its value.

ex: Number: 238

Place Value:

ones

hundreds

Value: 30

ex: Number: 109

Place Value:

tens

hundreds

Value: 9

a. Number: 743

Place Value:

ones

tens

hundreds

Value: __________

Answer:

Place Value:

Value: **700**

Explanation:

Drawn a circle for the place value of the underlined digit as we can observe in the above image. The value is written as 700.

b. Number: 253

Place Value:

ones

tens

hundreds

Value: __________

Answer:

Place Value:

Value: **3
**Explanation:

Drawn a circle for the place value of the underlined digit as we can observe in the above image. The value is written as 3.

c. Number: 150

Place Value:

ones

tens

hundreds

Value: __________

Answer:

Place Value:

Value: **50**

Explanation:

Drawn a circle for the place value of the underlined digit as we can observe in the above image. The value is written as 50.

d. Number: 608

Place Value:

ones

tens

hundreds

Value: __________

Answer:

Value: **600**

Explanation:

Drawn a circle for the place value of the underlined digit as we can observe in the above image. The value is written as 600.

Question 2.

Write one of these signs on each line to make the equation true.

< less than

= equal to

> greater than

456 < 546

85 ____________ 58

327 ____________ 372

106 ____________ 610

218 ____________ 218

735 ____________ 573

204 ____________ 240

483 ____________ 438

Answer:

85 **>** 58

327 **< **372

106 < 610

218 = 218

735 > 573

204 < 240

483 > 438

Explanation:

Used one of the above given signs on each line to make the equation true as we can observe in the above answer.

Question 3.

Fill in the missing digits to make each equation true. There is more than one right answer for each one.

327 < 347

235 > ____35

307 < ___07

135 < 13____

4___3 > 463

1___9 < 139

182 > 1____2

514 < 51____

Answer:

235 > **1**35

307 < **4**07

135 < 13**6**

4**7**3 > 463

1**2**9 < 139

182 > 1**7**2

514 < 51**5 **

Explanation:

The missing digits are filled to make each given equation true as we can observe in the above answer.

There are many different types of sharks. Some are longer than others. This chart shows how long some of the different sharks are. Use it to help answer the questions below.

Question 4.

Which shark on the chart is the longest?

Answer:

Thresher Shark is the longest Shark in the given chart.

Question 5.

Which shark on the chart is the shortest?

Answer:

Night Shark is the shortest Shark in the given chart.

Question 6.

Write one of these symbols on each blank to make the sentence true.

< less than

= equal to

> greater than

a. Length of a Tiger Shark _____________ Length of a White Shark

Answer:

Length of a Tiger Shark is 247 centimeters.

Length of a White Shark is 204 centimeters.

Length of a Tiger Shark **> ****greater than** Length of a White Shark

b. Length of a Bignose Shark ____________ Length of a Tiger Shark

Answer:

Length of a Bignose Shark is 174 centimeters.

Length of a Tiger Shark is 247 centimeters.

Length of a Bignose Shark **< less than** Length of a Tiger Shark

Question 7.

Put the lengths of the sharks in order from least to greatest.

Answer:

Explanation:

The given length of the Sharks is arranged in order from least to greatest as we can observe in the above image.

Question 8.

How much longer is a Thresher Shark than a Tiger Shark? Show your work. Mark the answer clearly.

Answer:

Length of Thresher Shark is 373 centimeters.

Length of Tiger Shark is 247 centimeters.

373 – 247 = 126 centimeters

Thresher Shark is **126 centimeters** longer than Tiger Shark.