Practicing the Bridges in Mathematics Grade 4 Home Connections Answer Key Unit 1 Module 1 will help students analyze their level of preparation.
Bridges in Mathematics Grade 4 Home Connections Answer Key Unit 1 Module 1
Bridges in Mathematics Grade 4 Home Connections Unit 1 Module 1 Session 2 Answer Key
Number Line Puzzles
Note to Families
Students can use number lines to review the multiplication facts they learned in third grade. Number lines can help students use facts they know to help them figure facts they don’t remember. Talk together about relationships between facts that you see in the two number lines below, such as numbers that double.
Question 1.
Fill in the blanks in the number lines.
a.
Answer:
2 x 4 = 8.
3 x 4 = 12.
4 x 4 = 16.
8 x 4 = 32.
9 x 4 = 36.
10 x 4 = 40.
b.
Answer:
2 x 8 = 16.
3 x 8 = 24.
4 x 8 = 32.
8 x 8 = 64.
8 x 8 = 72.
10 x 8 = 80.
Question 2.
Complete the facts.
Answer:
Question 3.
Roger’s little brother, Saul, wants to know if 5 × 7 = 7 × 5. If you were Roger, how would you explain to Saul whether the equation is true?
Answer:
Given that the equation is 5 x 7 = 7 x 5
The equation is the example of reflective property.
5 x 7 = 35.
7 x 5 = 35
35 = 35
The reflection property says that is when any number is equal to the same number itself.
Question 4.
Each of the 29 students in Mr. Brown’s fourth grade brought 2 notebooks to class the first day of school. How many notebooks was that in all? Show your thinking with numbers, sketches, or words. Then write an equation that represents your work.
Answer:
Given that,
Each of the 29 students in Mr. Brown’s fourth grade brought 2 notebooks.
The total number of notebooks is 29 x 2 = 58.
Therefore the equation is 29 x 2 = 58.
Question 5.
Each of the students in Mr. Smith’s class also brought in 3 pocket folders. Mr. Smith wrote a multiplication equation to compare the number of students to the number of pocket folders they brought in. Fill in the bubble to show what this equation means.
87 = 3 × 29
87 is 3 more than 29
87 is 3 times as many as 29
29 is 3 times as many as 87
Answer:
Given that,
Each of the students in Mr. Smith’s class also brought in 3 pocket folders.
The equation is 87 = 3 x 29.
3 times of 29 is 87.
29 + 29 + 29 = 87.
Therefore the answer is 29 is 3 times as many as 87.
Question 6.
CHALLENGE If 5 students each brought in 8 boxes with 10 pencils per box, and 10 students each brought in 8 boxes with 5 pencils per box, how many total pencils did the students bring in? Show your thinking with numbers, sketches, or words.
Answer:
Given that,
The 5 students each brought in 8 boxes with 10 pencils per box.
The number of boxes are 5 x 8 = 40.
The number of pencils are 40 x 10 = 400.
The 10 students each brought in 8 boxes with 5 pencils per box,
The number of boxes is 10 x 8 = 80.
The number of pencils is 80 x 5 = 400.
Therefore the total number of pencils is 400 + 400 = 800.
Bridges in Mathematics Grade 4 Home Connections Unit 1 Module 1 Session 4 Answer Key
Models for Multiplication
Write a story situation to go with each multiplication model.
ex
Multiplication Model
Story
Keith’s do Spot, ate 2 cans of dog food every day for 3 days in a row. Spot ate 6 cans of dog food in 3 days.
Question 1.
Multiplication Model
Story
Answer:
The cat jumps 7 times and the each jump is 6 feet’s for a total of 42 feet’s
Question 2.
Multiplication Model
Story
Answer:
There were 4 members each member ate 4 breads they ate 16 breads in all.
Question 3.
Multiplication Model
Story
Answer:
The wall is 4 feet’s height wide and 6 feet’s long it total area is 24 sq. feet’s.
Question 4.
Multiplication Model
Story
Answer:
One grasshopper has 6 legs. For any number of grasshoppers multiply by 6 to get the number of legs.
Question 5.
Multiplication Model
Story
Answer:
There are 5 rows each row has 6 tiles. The total floor is covered by 30 tiles.
Question 6.
Multiplication Model
Story
Answer:
There are 9 students in the class room they given $8 each to the class teacher for the picnic. the total collected money is 72.
Question 7.
There are 4 rows of crayons in this box. Each row has the same number of crayons. How many crayons are in the box? Show your thinking.
Answer:
Given that,
There are 4 rows of crayons in this box.
Each row has the same number of crayons.
The number of crayons in each row is 4.
The number of crayons is 4 x 4 = 16.
Therefore the total number of crayons in this box is 16.
Question 8.
Teachers collected $5 from each of the 130 fourth grade students at the beginning of the year for field trips. The first field trip cost $120. The second field trip cost $250. How much can they spend on the last field trip if they need to have $25 left over to wash the bus? Show your thinking using words, numbers, or pictures.
Answer:
Given that,
Teachers collected $5 from each of the 130 fourth grade students at the beginning of the year for field trips.
The collected money is $5 x 130 = $650.
The first field trip cost $120. The second field trip cost $250.
The $25 left over to wash the bus.
Therefore $650 – $120 + $250 + $25.
$650 – $395 = $255.
Therefore the cost for the third field trip is $255.
Bridges in Mathematics Grade 4 Home Connections Unit 1 Module 1 Session 6 Answer Key
Modeling Multiplication & Division
For problems 1 and 2, complete the sketches and write the equations.
Question 1.
Answer:
Question 2.
Answer:
Question 3.
Copy one equation from above and write a story problem to go with it.
ex I bought 5 packs of pencils. Each pack had 4 pencils in it. How many pencils did I get? (5 × 4 = 20)
Answer:
Given that,
I bought 5 packs of pencils.
Each pack had 4 pencils in it.
The number of pencils is 5 x 4 = 20.
Therefore the total number of pencils is 20.
Complete the number line and ratio table.
Question 4.
Answer:
2 x 5 = 10.
3 x 5 = 15.
4 x 5 = 20.
5 x 5 = 25.
6 x 5 = 30.
Question 5.
Answer:
1 x 3 = 3.
2 x 3 = 6.
3 x 3 = 9.
4 x 3 = 12.
5 x 3 = 15.
6 x 3 = 18.
7 x 3 = 21.
8 x 3 = 24.
Question 6.
Mr. Still’s class has music for 50 minutes and then independent reading for 20 minutes. Music starts at 8:30. What time does Mr. Still’s class finish independent reading?
Answer:
Given that,
Mr. Still’s class has music for 50 minutes and then independent reading for 20 minutes.
The total time in minutes is 70 minutes it is 1hour 10 minutes.
The class starts at 8:30.
Class ends at 8:30 + 1 hour 10 minutes = 9:40.
Therefore Mr. Still’s class finish independent reading at 9:40.
Question 7.
Ms. Ford’s class starts art at 9:30 and finishes at 10:15. They spend twice as much time in math class. If they start math at 1:10, what time do they finish math?
Answer:
Given that,
Ms. Ford’s class starts art at 9:30 and finishes at 10:15.
The time duration of the class is 45 minutes.
The math class is twice of the class that is 45 minutes + 45 minutes = 90 minutes.
If the math class starts at 1:10.
1 hour = 60 minutes
The finishing time of math class is 1:10 + 90 minutes = 2:40
Therefore the math class finish at 2:40