The solutions to Bridges in Mathematics Grade 3 Home Connections Answer Key Unit 7 Module 1 can help students to clear their doubts quickly.
Bridges in Mathematics Grade 3 Home Connections Answer Key Unit 7 Module 1
Bridges in Mathematics Grade 3 Home Connections Unit 7 Module 1 Session 2 Answer Key
Operations & Equations
Question 1.
Solve the addition and subtraction problems.
Answer:
Question 2.
Write a greater than, less than, or equal sign to complete each equation.
36 + 4 < 26 + 20
5 × 8 ____________ 10 × 3
12 + 18 ___________ 2 + 28
25 – 10 ____________ 35 – 20
2 × 12 ____________ 2 × 8
1 × 9 _____________ 3 × 4
Answer:
5 × 8 > 10 × 3
12 + 18 = 2 + 28
25 – 10 = 35 – 20
2 × 12 > 2 × 8
1 × 9 < 3 × 4
Explanation:
5 × 8 = 40
10 × 3 = 30
40 > 30
5 × 8 > 10 × 3
12 + 18 = 30
2 + 28 = 30
30 = 30
12 + 18 = 2 + 28
25 – 10 = 15
35 – 20 = 15
15 = 15
25 – 10 = 35 – 20
2 × 12 > 2 × 8
2 × 12 = 24
2 × 8 = 16
24 > 16
2 × 12 > 2 × 8
1 × 9 < 3 × 4
1 × 9 = 9
3 × 4 = 12
9 < 12
CHALLENGE
890 – 500 ____________ 756 – 540
400 __________ 150 + 250
2 × 96 ______________ 4 × 50
1 × 450 ______________ 500 – 50
Answer:
890 – 500 > 756 – 540
390 > 216
400 = 150 + 250
400 = 400
2 × 96 < 4 × 50
192 < 200
1 × 450 = 500 – 50
450 = 450
Question 3.
Pick the equation that will help you solve the problem. Then solve the problem. Jake found 32 shells on the beach. He gave half of them to his brother. Then his sister gave Jake 18 more shells. How many shells does Jake have now?
(32 × 2) + 18 = ?
(32 × 2) – 18 = ?
(32 ÷ 2) + 18 = ?
Jake has ____________ shells.
Answer:
Given,
Jake found 32 shells on the beach. He gave half of them to his brother.
Then his sister gave Jake 18 more shells.
(32 ÷ 2) + 18
16 + 18 = 34
Jake has 34 shells.
Question 4.
Pick the equation that will help you solve the problem. Then solve the problem and show your work.
a. The pet store got 53 fish. They sold 29 of the fish right away. They divided the rest of the fish evenly into 3 tanks. How many fish were in each tank? (The letter f in the equations below stands for fish.)
53 – 29 = f
(53 – 29) ÷ 3 = f
(53 + 29) ÷ 3 = f
53 + 29 × 3 = f
There were ______________ fish in each tank.
Answer:
Given,
The pet store got 53 fish. They sold 29 of the fish right away. They divided the rest of the fish evenly into 3 tanks.
(53 – 29) ÷ 3 = f
24 ÷ 3 = f
f = 8
There were 8 fish in each tank.
b. CHALLENGE You can get Fantastic Fish Food at the pet store in two different sizes. The smaller size is 60 grams. The larger size is 3 times that much, plus another 11 grams. How many grams is the larger size? (The letter g in the equations below stands for grams.)
(60 + 3) + 11 = g
(60 × 3) – 11 = g
(60 × 3) + 11 = g
(60 ÷ 3) × 11 = g
The larger size is _____________ grams.
Answer:
Given,
You can get Fantastic Fish Food at the pet store in two different sizes. The smaller size is 60 grams.
The larger size is 3 times that much, plus another 11 grams.
(60 × 3) + 11 = g
180 + 11 = g
g = 191
The larger size is 191 grams.
Bridges in Mathematics Grade 3 Home Connections Unit 7 Module 1 Session 4 Answer Key
Multiplying by Elevens & Twelves
Question 1.
Sam and Terra built some multiplication arrays with base ten area pieces. For each of their arrays:
- Label the dimensions.
- Write two different equations to show how many units there are.
ex:
Equations:
11 + 11 + 11 + 11 = 44
4 × 11 = 44
a.
Equations: ________________
Answer:
6 × 11 = 66
60 + 6 = 66
(11 × 3) + (11 × 3) = 66
b.
Equations: ________________
Answer:
8 × 12 = 96
(8 × 10) + (8 × 2)
80 + 16 = 96
48 + 48 = 96
c.
Equations: ________________
Answer:
7 × 12 = 84
(7 × 10) + (7 × 2)
70 + 14 = 84
Question 2.
Holly and Micah used dimes and pennies to show some multiplication facts. Write a multiplication equation to show how much money is shown in each arrangement.
ex:
Multiplication equation:
2 × 12¢ = 24¢
a.
Multiplication equation: ______________
Answer:
3 × 11 = 33¢
b.
Multiplication equation: ______________
Answer:
5 × 11 = 55¢
c.
Multiplication equation: ______________
Answer:
5 × 12 = 60¢
Question 3.
Make sketches of dimes and pennies or base ten area pieces to show and solve each problem. Label your sketches.
a. 7 × 11 = _______________
Answer: 77
b. 4 × 12 = _______________
Answer: 48
Question 4.
Use numbers, pictures, or words to solve each of the problems below. Show all of your work.
a. King School is holding a bake sale. Jose’s mom brought 2 dozen chocolate chip cookies, and Jana’s dad brought 3 dozen peanut butter cookies. The helpers took the cookies out of their bags and put them on plates. They put 10 on every plate. How many plates did they need?
Answer:
Given,
Jose’s mom brought 2 dozen chocolate chip cookies, and Jana’s dad brought 3 dozen peanut butter cookies. The helpers took the cookies out of their bags and put them on plates.
They put 10 on every plate.
2 dozen = 24
3 dozen = 36
24 + 36 = 60
60 ÷ 10 = 6
6 plates needed.
b. Sam was helping his mom plant a garden. They planted 7 rows of lettuce. Four of the rows had 11 lettuce plants. Three of the rows had 12 lettuce plants. How many lettuce plants did they plant in all?
Answer:
4 × 11 = 44
3 × 12 = 36
44 + 36 = 80 lettuce plants.