Practicing the **Bridges in Mathematics Grade 2 Home Connections Answer Key Unit 7 Module 2** will help students analyze their knowledge of concepts.

## Bridges in Mathematics Grade 2 Home Connections Answer Key Unit 7 Module 2

**Bridges in Mathematics Grade 2 Home Connections Unit 7 Module 2 Session 2 Answer Key**

**More Ant Stories**

Question 1.

There are 4 lines of ants. There are 5 ants in every line. The queen wants 30 ants for her parade.

a. How many ants are lined up right now? Show your work.

Answer:

Total number of ants are lined up right now = 20.

Explanation:

Number of lines of ants = 4.

Number of ants in each line = 5.

Number of ants queen wanted for her parade = 30.

Total number of ants are lined up right now = Number of lines of ants × Number of ants in each line

= 4 × 5

= 20.

b. How many more ants need to line up? Show your work.

Answer:

Number of more ants need to line up = 10.

Explanation:

Number of lines of ants = 4.

Number of ants in each line = 5.

Number of ants queen wanted for her parade = 30.

Total number of ants are lined up right now = 20.

Number of more ants need to line up = Number of ants queen wanted for her parade – Total number of ants are lined up right now

= 30 – 20

= 10.

Question 2.

**CHALLENGE** Use the numbers in the box to fill in the blanks below.

a. Find 2 numbers whose sum is 21. ___________, ___________

Answer:

Given numbers: 3, 4, 5, 6, 10, 11, 12, 16, 17, 18, 23.

2 numbers whose sum is 21 are:

17, 4.

16, 5.

18, 3.

Explanation:

2 numbers whose sum is 21 = ??

17 + 4 = 21.

16 + 5 = 21.

18 + 3 = 21.

b. Find 2 numbers whose sum is 29. ___________, ___________

Answer:

2 numbers whose sum is 29 are 23 and 6.

Explanation:

Given numbers: 3, 4, 5, 6, 10, 11, 12, 16, 17, 18, 23.

2 numbers whose sum is 29:

23 + 6 = 29.

c. Find 2 numbers whose difference is 10. ___________, ___________

Answer:

2 numbers whose difference is 10 are 16 and 6.

Explanation:

Given numbers: 3, 4, 5, 6, 10, 11, 12, 16, 17, 18, 23.

2 numbers whose difference is 10:

16 – 6 = 10.

d. Find 2 numbers whose difference is 14. ___________, ___________

Answer:

2 numbers whose difference is 14 are 18 and 4.

Explanation:

Given numbers: 3, 4, 5, 6, 10, 11, 12, 16, 17, 18, 23.

2 numbers whose difference is 14:

18 – 4 = 14.

e. Find 4 numbers that have the smallest total. ___________, ___________, ___________, ___________

Answer:

4 numbers that have the smallest total – _____3______, ____4_______, _____5______, _____6______.

Explanation:

Given numbers: 3, 4, 5, 6, 10, 11, 12, 16, 17, 18, 23.

4 numbers that have the smallest total:

5 + 4 = 9.

3 + 6 = 9.

Hi! I am a worker army ant. I am 1 centimeter long.

My 10 army ant friends make a line that is 10 centimeters, or 1 decimeter, long.

Question 3.

List four different things on you or in your kitchen that are about the same length as a decimeter.

Answer:

Four different things on you or in your kitchen that are about the same length as a decimeter are:

1. My hair – 60 centimeters – 6 decimeters.

2. Gas stove – 100 centimeters – 10 decimeters.

3. Spoon – 10 centimeters – 1 decimeters.

4. Water bottle – 30 centimeters – 3 decimeters.

Explanation:

Number of centimeters long a worker army ant = 1.

Number of centimeters long 10 army ant friends make a line = 10.

Number of decimeters long 10 army ant friends make a line =1.

Four different things on you or in your kitchen that are about the same length as a decimeter:

1. My hair – 60 centimeters – 6 decimeters.

2. Gas stove – 100 centimeters – 10 decimeters.

3. Spoon – 10 centimeters – 1 decimeters.

4. Water bottle – 30 centimeters – 3 decimeters.

Question 4.

Use your ruler to help draw a line below that is exactly 15 centimeters long. How many of us army ants could stand on your line?

Answer:

Number of ants stand on the line = 15.

Explanation:

Number of centimeters the number line = 15.

Number of centimeters each ant = 1.

=> Number of ants stand on the line = 15.

Question 5.

One hundred of my army ant friends would make a line that is 100 centimeters, or 1 meter long. That’s about the same as the distance between the floor and the doorknob on a regular door.

List four different things in your home that are about the same length as a meter.

Answer:

Four different things in your home that are about the same length as a meter are

1. Small Refrigerator – 300 centimeters – 3 meters.

2. Dining table – 200 centimeters – 2 meters.

3. Air conditioner – 100 centimeters – 1 meters.

4. Bike – 400 centimeters – 4 meters.

Explanation:

One hundred of my army ant friends would make a line that is 100 centimeters, or 1 meter long.

=> Number of ants make a line = 100 centimeters or 1 meter long.

Four different things in your home that are about the same length as a meter:

1. Small Refrigerator – 300 centimeters – 3 meters.

2. Dining table – 200 centimeters – 2 meters.

3. Air conditioner – 100 centimeters – 1 meters.

4. Bike – 400 centimeters – 4 meters.

**Bridges in Mathematics Grade 2 Home Connections Unit 7 Module 2 Session 4 Answer Key**

**Fraction Races & More**

Note to Families

Here are the rules for a new fraction game we learned in school. Please play this game with your child several times. Then have your child complete the exercise on the back of this sheet and return it to school.

1. Use the extra set of construction paper strips to fold, cut, and label another fraction kit. It should be just like the one you brought home with you.

2. Set your whole strip out in front of you and stack the other fraction pieces to the side so you’re ready to play. Have your partner do the same.

3. Anchor a paperclip with a pencil and use it as a spinner arrow. Spin the spinner and take the fraction piece that it names and lay it on top of your whole strip. Then give your partner a turn. Continue taking turns back and forth until one of you has filled your whole strip. The tricky part is that you have to go out evenly. If you spin a fourth and then a half, so that three-fourths of your whole strip is covered, and then spin another half, you can’t use it. In this case, you lose your turn and have to wait until your next turn to try again.

4. When one person has won by filling his or her entire strip with fraction pieces, clear them off and play again.

5. When this seems easy, play backward. That is, start by covering your whole strip with fraction pieces. (You can do this using any combination of pieces you want—2 halves, 4 fourths, a half, a fourth, and 2 eighths, etc. You may have to do some trading along the way.) Then take turns spinning the spinner and removing the pieces it names. The first person to remove all of his or her pieces from the strip is the winner.

**Comparing Fractions**

**Use your fraction pieces to do the exercises below.**

Question 1.

Circle the larger of the two fractions in each pair. The first one is done for you.

ex:

a. \(\frac{1}{2}\) \(\frac{1}{4}\)

Answer:

\(\frac{1}{2}\) > \(\frac{1}{4}\).

Explanation:

\(\frac{1}{2}\) \(\frac{1}{4}\)

=> \(\frac{1}{2}\) = 0.5.

\(\frac{1}{4}\) = 0.25.

=> \(\frac{1}{2}\) is greater than \(\frac{1}{4}\).

b. \(\frac{1}{4}\) \(\frac{3}{8}\)

Answer:

latex]\frac{1}{4}[/latex] < \(\frac{3}{8}\).

Explanation:

latex]\frac{1}{4}[/latex] = 0.25.

\(\frac{3}{8}\) = 0.375.

=> latex]\frac{1}{4}[/latex] is lesser than \(\frac{3}{8}\).

c. \(\frac{3}{8}\) \(\frac{1}{2}\)

Answer:

\(\frac{3}{8}\) < \(\frac{1}{2}\).

Explanation:

\(\frac{3}{8}\) = 0.375.

\(\frac{1}{2}\) = 0.5.

=> \(\frac{3}{8}\) is lesser than \(\frac{1}{2}\).

Question 2.

Circle the smaller of the two fractions in each pair.

a. \(\frac{1}{8}\) \(\frac{1}{4}\)

Answer:

\(\frac{1}{8}\) < \(\frac{1}{4}\).

Explanation:

\(\frac{1}{8}\) = 0.125.

\(\frac{1}{4}\) = 0.25.

=> \(\frac{1}{8}\) is lesser than \(\frac{1}{4}\).

b. \(\frac{1}{4}\) \(\frac{3}{8}\)

Answer:

\(\frac{1}{4}\) < \(\frac{3}{8}\).

Explanation:

\(\frac{1}{4}\) = 0.25.

\(\frac{3}{8}\) = 0.375.

=> \(\frac{1}{4}\) is lesser than \(\frac{3}{8}\).

c. \(\frac{3}{8}\) \(\frac{1}{2}\)

Answer:

\(\frac{3}{8}\) < \(\frac{1}{2}\).

Explanation:

\(\frac{3}{8}\) = 0.375.

\(\frac{1}{2}\) = 0.50.

=> \(\frac{3}{8}\) is lesser than \(\frac{1}{2}\).

Question 3.

Lay out each combination of fractions shown below and find one fraction piece that is the same length. The first one is done for you.

ex:

a. \(\frac{1}{4}\) + \(\frac{1}{4}\) = _________________

Answer:

\(\frac{1}{4}\) + \(\frac{1}{4}\) = \(\frac{1}{2}\).

Explanation:

\(\frac{1}{4}\) + \(\frac{1}{4}\) = (1 + 1) ÷ 4

= 2 ÷ 4

= 1 ÷ 2 or \(\frac{1}{2}\).

b. \(\frac{1}{2}\) + \(\frac{1}{2}\) = _________________

Answer:

\(\frac{1}{2}\) + \(\frac{1}{2}\) = 1.

Explanation:

\(\frac{1}{2}\) + \(\frac{1}{2}\) = (1 + 1) ÷ 2

= 2 ÷ 2

= 1.

c. \(\frac{2}{8}\) + \(\frac{1}{4}\) = _________________

Answer:

\(\frac{2}{8}\) + \(\frac{1}{4}\) = \(\frac{1}{2}\).

Explanation:

\(\frac{2}{8}\) + \(\frac{1}{4}\) = [(2× 1) + (1 × 2)] ÷ 8 (LCM of 8,4 = 8)

= (2 + 2) ÷ 8

= 4 ÷ 8

= 1 ÷ 2 or \(\frac{1}{2}\).

d. \(\frac{1}{4}\) + \(\frac{1}{4}\) + \(\frac{1}{4}\) + \(\frac{1}{4}\) = _______________

Answer:

\(\frac{1}{4}\) + \(\frac{1}{4}\) + \(\frac{1}{4}\) + \(\frac{1}{4}\) = 1.

Explanation:

\(\frac{1}{4}\) + \(\frac{1}{4}\) + \(\frac{1}{4}\) + \(\frac{1}{4}\) =

= (1 + 1 + 1 + 1) ÷ 4

= 4 ÷ 4

= 1.

e. \(\frac{1}{4}\) + \(\frac{1}{4}\) + \(\frac{1}{2}\) = ________________

Answer:

\(\frac{1}{4}\) + \(\frac{1}{4}\) + \(\frac{1}{2}\) = 1.

Explanation:

\(\frac{1}{4}\) + \(\frac{1}{4}\) + \(\frac{1}{2}\) = [(1 + 1) +(1 × 2)] ÷ 4 (LCM of 4, 2 = 4)

= (2 + 2) ÷ 4

= 4 ÷ 4

= 1.

f. \(\frac{1}{8}\) + \(\frac{1}{8}\) + \(\frac{1}{2}\) = ________________

Answer:

\(\frac{1}{8}\) + \(\frac{1}{8}\) + \(\frac{1}{2}\) = \(\frac{3}{4}\).

Explanation:

\(\frac{1}{8}\) + \(\frac{1}{8}\) + \(\frac{1}{2}\) = {(1 + 1) + (1 × 4)] ÷ 8

= (2 + 4) ÷ 8

= 6 ÷ 8

= 3 ÷ 4 or \(\frac{3}{4}\).