The solutions to **Bridges in Mathematics Grade 3 Home Connections Answer Key Unit 4 Module 1** can help students to clear their doubts quickly.

## Bridges in Mathematics Grade 3 Home Connections Answer Key Unit 4 Module 1

**Bridges in Mathematics Grade 3 Home Connections Unit 4 Module 1 Session 2 Answer Key**

**Writing Time in Different Ways**

Question 1.

Write the time shown on each clock with numbers. Write it again with words.

ex

a.

Answer:

Time: 4:45.

Four Forty Five.

Explanation:

Given time in clock: 4:45.

=> Time in words: Four Forty Five.

b.

Answer:

Time: 2:35.

Two Thirty Five.

Explanation:

Given time in clock: 2:35.

=> Time in words: Two Thirty Five.

c.

Answer:

Time: 2:50.

Two Fifty.

Explanation:

Given time in clock: 2:50.

=>Time in words: Two Fifty.

d.

Answer:

Time: 1:15.

One Fifteen.

Explanation:

Given time in clock: 1:15.

=> Time in words: One Fifteen.

e.

Answer:

Time: 4:40.

Four Forty.

Explanation:

Given time in clock: 4:40.

=> Time in words: Four Forty.

Question 2.

How many minutes are there in an hour? ________

Answer:

Number of minutes in an hour are 60.

Explanation:

Number of minutes in an hour = 60.

Conversion:

1 hour = 60 minutes.

**Writing Time in Different Ways**

Question 3.

Write the time shown on each clock with number words. Write it again with time telling words.

ex.

a.

Answer:

6:30.

Six Thirty.

Half past Six.

Explanation:

Given Time: 6:30.

Time in words: Six Thirty.

Half past Six.

b.

Answer:

3:15.

Three Fifteen.

Quarter past Four.

Explanation:

Given Time: 3:15.

Time in words: Three Fifteen.

Quarter past Four.

c.

Answer:

8:45.

Eight Forty Five.

Quarter ’til Nine.

Explanation:

Given Time: 8:45.

Time in words: Eight Forty Five.

Quarter till’ Nine.

d.

Answer:

2:15.

Two Fifteen.

Quarter past 3.

Explanation:

Given Time: 2:15.

Time in words: Two Fifteen.

Quarter past 3.

e.

Answer:

4:45.

Four Forty Five.

Quarter till’ Five.

Explanation:

Given Time: 4:45.

Time in words: Four Forty Five.

Quarter ’til Five.

Question 4.

**CHALLENGE** How many minutes are there in the following fractions of an hour?

\(\frac{2}{4}\) of an hour ____ \(\frac{3}{4}\) of an hour ____ \(\frac{1}{3}\) of an hour _______

\(\frac{1}{6}\) of an hour ____ \(\frac{3}{6}\) of an hour ______ \(\frac{1}{12}\) of an hour _______

\(\frac{2}{3}\) of an hour _____ \(\frac{5}{12}\) of an hour ______

Answer:

Minutes are there in the following fractions of an hour:

\(\frac{2}{4}\) of an hour = 30 minutes.

\(\frac{3}{4}\) of an hour = 45 minutes.

\(\frac{1}{3}\) of an hour = 20 minutes.

\(\frac{1}{6}\) of an hour = 10 minutes.

\(\frac{3}{6}\) of an hour = 30 minutes.

\(\frac{1}{12}\) of an hour = 5 minutes.

\(\frac{2}{3}\) of an hour = 40 minutes.

\(\frac{5}{12}\) of an hour = 25 minutes.

Explanation:

Number of minutes:

\(\frac{2}{4}\) of an hour = 0.5 of an hour = 0.5 × 60 = 30 minutes.

\(\frac{3}{4}\) of an hour = 0.75 of an hour = 0.75 × 60 = 45 minutes.

\(\frac{1}{3}\) of an hour = 0.33 of an hour = 0.33 × 60 = 20 minutes.

\(\frac{1}{6}\) of an hour = 0.167 of an hour = 0.167 × 60 = 10 minutes.

\(\frac{3}{6}\) of an hour = 0.5 of an hour = 0.5 × 60 = 30 minutes.

\(\frac{1}{12}\) of an hour = 0.833 of an hour = 0.833 × 60 = 5 minutes.

\(\frac{2}{3}\) of an hour = 0.667 of an hour = 0.667 × 60 = 40 minutes.

\(\frac{5}{12}\) of an hour = 0.417 of an hour = 0.417 × 60 = 25 minutes.

**Bridges in Mathematics Grade 3 Home Connections Unit 4 Module 1 Session 4 Answer Key**

**Annie’s School Day**

Question 1.

Annie is a third grader at Bridger School. There are two clocks in her classroom. One is a digital clock, and the other is an analog clock with a regular clock face. Read the clocks below, and write the time to show when the class does different activities through the day.

a. School starts at _____.

Answer:

School starts at 8:20.

Explanation:

Number clocks in her classroom = 2.

Time shown in the analog clock: 8:20.

Time in words: Eight Twenty.

8:20.

b. Reading starts at _____.

Answer:

Reading starts at 8:35.

Explanation:

Number clocks in her classroom = 2.

Time shown in the analog clock: 8:35.

Time in words: Eight Thirty Five.

c. Recess is over at 10:20, but by the time the kids got back to class today, it was _____.

Answer:

Recess is over at 10:20, but by the time the kids got back to class today, it was 10:22.

Explanation:

Number clocks in her classroom = 2.

Time shown in the digital clock: 10:22.

Time in words: Ten Twenty Two.

d. On Tuesdays and Thursdays, Annie’s class has gym at 11:25, but today they got there a little early, at

___________

Answer:

On Tuesdays and Thursdays, Annie’s class has gym at 11:25, but today they got there a little early, at 11.20.

Explanation:

Number clocks in her classroom = 2.

Time shown in the analog clock: 11:20.

Time in words: Eleven Twenty.

11:20.

e. Recess starts at 10:00, but Annie’s class is sometimes a few minutes late getting out to the playground. Today, they got out at

___________

Answer:

Recess starts at 10:00, but Annie’s class is sometimes a few minutes late getting out to the playground. Today, they got out at 10:03.

Explanation:

Number clocks in her classroom = 2.

Time shown in the analog clock: 10:03.

Time in words: Ten Three.

10:03.

f. Lunch starts at 11:50, and then the kids have recess again. Annie and her friends didn’t get out to the playground until ________ today.

Answer:

Lunch starts at 11:50, and then the kids have recess again. Annie and her friends didn’t get out to the playground until 12:17 today.

Explanation:

Number clocks in her classroom = 2.

Time shown in the digital clock: 12:17.

Time in words: Twelve Seventeen.

g. Annie’s teacher always reads a chapter book to the class after lunch recess. It took the kids a few minutes to get settled, so Mr. Willis didn’t start reading until .

___________

Answer:

Annie’s teacher always reads a chapter book to the class after lunch recess. It took the kids a few minutes to get settled, so Mr. Willis didn’t start reading until 12:36.

Explanation:

Number clocks in her classroom = 2.

Time shown in the digital clock: 12:36.

Time in words: Twelve Thrity Six.

12:36.

h. Math always starts at 1:00, but Mr. Willis got finished with the book a couple of minutes early, so the class started math at ______.

Answer:

Math always starts at 1:00, but Mr. Willis got finished with the book a couple of minutes early, so the class started math at 12:58.

Explanation:

Number clocks in her classroom = 2.

Time shown in the digital clock: 12:58.

Time in words: Twelve Fifty Eight.

**Show your thinking in numbers, words, or sketches when you solve these problems.**

Question 2.

Annie measured the cover of her library book using jumbo paperclips. She found that it is 5 paperclips high and 4\(\frac{1}{2}\) paperclips wide. A jumbo paperclip is 5 centimeters long.

a. How many centimeters high is the cover of Annie’s library book?

Answer:

Number of centimeters high is the cover of Annie’s library book = 25.

Explanation:

Number of paperclips high She found = 5.

Number of paperclips wide She found = 4\(\frac{1}{2}\).

Length of the jumbo paperclip = 5 centimeters.

Number of centimeters high is the cover of Annie’s library book = Number of paperclips high She found × Length of the jumbo paperclip

= 5 × 5

= 25.

b. How many centimeters wide is the cover of Annie’s book?

Answer:

Number of centimeters wide is the cover of Annie’s library book = 22.5.

Explanation:

Number of paperclips high She found = 5.

Number of paperclips wide She found = 4\(\frac{1}{2}\).

Length of the jumbo paperclip = 5 centimeters.

Number of centimeters wide is the cover of Annie’s library book = Number of paperclips wide She found × Length of the jumbo paperclip

= 4\(\frac{1}{2}\) × 5

= {[(4 × 2) + 1] ÷ 2} × 5

= [(8 + 1) ÷ 2] × 5

= (9 ÷ 2) × 5

= 45 ÷ 2

= 22.5.

Question 3.

**CHALLENGE** Annie’s reading class begins at 8:35 and lasts 1 hour and 45 minutes. What time is her reading class over? Show two different ways to find the answer.

a. One way:

b. Another way:

Annie’s reading class is over at ___________

Answer:

Annie’s reading class is over at 10:20.

Explanation:

Annie’s reading class begins at 8:35 and lasts 1 hour and 45 minutes.

=> Time class starts = 8:35.

Time of the class = 1 hour and 45 minutes.

a. One Way:

Time is her reading class over = 8:35 + 1:45

= 9 hours 80 minutes.

= 10 hours 20 minutes.

b. Another way:

Time is her reading class over = 8hours 35 mintes + 1 hour 45 minutes

= 9 hours 80 minutes

Conversion:

1 hour = 60 minutes.

=> 9 hours + 60 minutes + 20 minutes

=> 10 hours 20 minutes.

**Bridges in Mathematics Grade 3 Home Connections Unit 4 Module 1 Session 6 Answer Key**

**Measuring Mass & Weight page**

Question 1.

Read the scale. How much does the kitten weigh?

Answer:

650 grams is the weight of the kitten .

Explanation:

Weight of the kitten = 650 grams.

Question 2.

Look at the pan balance scale. What is the mass of the turtle?

Answer:

Mass of the turtle = 126g.

Explanation:

Mass of the turtle = Weight on the other scale.

=> 100g + 20g + 3g + 3g

=> 120g + 3g + 3g

=> 123g + 3g

=> 126 g.

Question 3.

The ____ of the box of crayons is ____.

Answer:

Mass of the crayons box = 127g.

Explanation:

Mass of the crayons box = Weight on the other scale.

=> 100g + 1g + 1g + 25g

=> 101g + 1g + 25g

=> 102 g + 25g

=> 127g.

Question 4.

Read the scale. How much do the oranges weigh?

Answer:

825 grams is the Weight of the oranges.

Explanation:

Weight of the oranges = 825 grams between.

Question 5.

Look at the pan balance scale. What is the mass of the bag of potatoes in grams? Show your work.

Answer:

4,504g is the mass of the bag of potatoes in grams.

Explanation:

The mass of the bag of potatoes in grams = 500g + 1kg + 1kg + 1kg + 1kg + 1g + 1g + 1g + 1g

= 500g + 4(1kg) + 4(1g)

= 500g + 4kg + 4g

= 4kg + 504g

= 4kg 504g

= 4000g 504g

= 4,504g.

Conversion:

1 kg = 1000g.

=> 4kg = 1000 × 4

=> 4000g.

Question 6.

What is the total mass of Sarina’s lunch, including her lunchbox, if her sandwich is 180 grams, her apple is 125 grams, and her cookies are 35 grams each? The lunch box itself has a mass of 350 grams. Sarina has 4 cookies in her lunch. Show your work.

Answer:

Total mass of Sarina’s lunch, including her lunchbox = 795 grams.

Explanation:

Mass of her sandwich = 180 grams.

Mass of her apple = 125 grams.

Mass of her cookies = 35 grams each.

Mass of her lunch box = 350 grams.

Number of cookies in her lunch = 4.

Total mass of Sarina’s lunch, including her lunchbox = Mass of her sandwich + Mass of her apple + Mass of her lunch box + (Number of cookies in her lunch × Number of cookies in her lunch)

= 180 + 125 + 350 + (35 × 4)

= 305 + 350 + 140

= 655 + 140

= 795.

Question 7.

Draw the hands on the analog clocks to show the times on the digital clocks for a and b below. Write the times shown on the analog clocks on the digital clocks for c and d below.

a.

Answer:

Explanation:

Time in the digital clock: 10:16.

Hours hand pointing – 10.

Minutes hand pointing – 3 and 4.

b.

Answer:

Explanation:

Time in the digital clock: 3:48.

Hours hand pointing – 3.

Minutes hand pointing – 9 and 10.

c.

Answer:

Explanation:

Time in the digital clock: 5:26.

Hours hand pointing – 5.

Minutes hand pointing – 5 and 6.

d.

Answer:

Explanation:

Time in the digital clock: 9:34.

Hours hand pointing – 9 and 10 inbetween.

Minutes hand pointing – 6 and 7.

Question 8.

**CHALLENGE:** Sarina’s piano teacher gave her a large candy bar. One serving weighs 39 grams. The candy bar has 2 and a half servings. How many grams does the whole candy bar weigh? Show all of your thinking.

Answer:

Weight of the whole candy bar = 97.5 grams.

Explanation:

Weight of One serving = 39 grams.

Weight of the candy bar servings = 2 and a half = 2.5.

Weight of the whole candy bar = Weight of the candy bar servings × Weight of One serving

= 2.5 × 39

= 97.5 grams.