All the solutions provided in McGraw Hill Math Grade 3 Answer Key PDF Chapter 6 Lesson 4 Multiply by 5 will give you a clear idea of the concepts.
McGraw-Hill My Math Grade 3 Answer Key Chapter 6 Lesson 4 Multiply by 5
Math in My World
Example 1
Leandro has 7 nickels. How much money does he have?
One nickel equals 5⊄. Skip count by fives to find 7 × 5⊄.
7 nickels is ____ ⊄. 7 × 5⊄ = ____ ⊄
So, Leandro has ____ ⊄
Notice the pattern in the products.
Extend the pattern.
4 × 5 = ____
5 × ____ = ____
6 × ____ = ____
7 × ____ = ____
Answer:
Given that,
Leandro has 7 nickels.
One nickel equals 5 cents.
7 nickels = 7 x 5 = 35 cents.
So, Leandro has 35 cents.
The patten is
0 x 5 = 0.
1 x 5 = 5.
2 x 5 = 10.
3 x 5 = 15.
4 x 5 = 20.
5 x 5 = 25.
6 x 5 = 30.
7 x 5 = 35.
Helpful Hint
When you multiply by 5, the product will end in 0 or 5.
Example 2
A watermelon patch has 6 rows of watermelons. Each row has 5 watermelons. How many watermelons are in the farmer’s patch? Write a multiplication sentence with a symbol for the unknown.
6 × 5 = 4 ← unknown
1. Draw an array with 6 rows.
2. Use the Commutative Property to draw another array with 5 rows.
There are ___ rows of ____.
So, 6 × 5 = ____
The unknown is ____
There are _____ watermelons in the farmer’s patch
There are ___ rows of ____.
So, 5 × 6 = ____
The unknown is ____
Answer:
The array of 6 rows of 5 is
There are 6 rows of 5.
So, 6 × 5 = 30
The unknown is 30
There are 30 watermelons in the farmer’s patch
The array of 5 rows of 6 is
There are 5 rows of 6.
So, 5 × 6 = 30
The unknown is 30.
Talk Math
Explain why the 5s facts might be easier to remember than other facts.
Answer:
The 5s facts might be easier to remember than other facts. Because in the clock between the every number it is 5s. So, 5s is easy to remember.
Guided Practice
Skip count by fives to find each product. Draw lines to match.
Answer:
Independent Practice
Write an addition sentence to help find each product.
Question 5.
2 × 5 = ____
5 + ___ = ____
Answer:
Multiply 2 with 5 then you get 10.
2 x 5 = 10.
5 + 5 = 10.
Question 6.
3 × 5 = ____
5 + ___ + ___ = ____
Answer:
Multiply 3 with 5 then you get 15.
3 x 5 = 15.
5 + 5 + 5 = 15.
Question 7.
7 × 5 = ____
Answer:
Multiply 7 with 5 then you get 35.
7 x 5 = 35.
5 + 5 + 5 + 5 + 5 + 5 + 5 = 35.
Question 8.
8 × 5 = ____
Answer:
Multiply 8 with 5 then you get 40.
8 x 5 = 40.
5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 40.
Question 9.
5 × 5 = ____
Answer:
Multiply 5 with 5 then you get 25.
5 x 5 = 25.
5 + 5 + 5 + 5 + 5 = 25.
Question 10.
9 × 5 = ___
Answer:
Multiply 9 with 5 then you get 45.
9 x 5 = 45
5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 45.
Draw an array for each. Then write a multiplication sentence.
Question 11.
7 rows of 5
7 × ___ = ____
Answer:
The array of 7 rows of 5 is
Multiply 7 with 5 then you get 35.
7 x 5 = 35.
Question 12.
3 rows of 5
___ × ___ = ____
Answer:
The array of 3 rows of 5 is
3 x 5 = 15.
Multiply 3 with 5 then you get 15.
Question 13.
4 rows of 5
____ × ___ = ____
Answer:
The array of 4 rows of 5 is
4 x 5 = 20.
Multiply 4 with 5 then you get 20.
Algebra Find each unknown. Use the Commutative Property.
Question 14.
× 6 = 30
6 × = 30
The unknown is ___.
Answer:
Multiply 5 with 6 then you get 30.
Multiply 6 with 5 then you get 30.
5 x 6 = 30.
6 x 5 = 30.
The unknown is 5.
Question 15.
5 × = 10
× 5 = 10
The unknown is ___.
Answer:
Multiply 5 with 2 then you get 10.
Multiply 2 with 5 then you get 10.
5 x 2 = 10.
2 x 5 = 10.
The unknow is 2.
Question 16.
9 × 5 =
5 × 9 =
The unknown is ___.
Answer:
Multiply 9 with 5 then you get 45.
Multiply 5 with 9 then you get 45.
9 x 5 = 45.
5 x 9 = 45.
The unknow is 45.
Problem Solving
Question 17.
Kai, Lakita, and Maxwell collected acorns. If each gets 5 acorns, how many acorns did they collect? Explain.
Answer:
Given that,
Kai, Lakita, and Maxwell collected acorns. If each gets 5 acorns.
The number of persons are 3.
So, 5 + 5 + 5 = 15.
or
3 x 5 = 15.
Therefore they collected 15 acorns.
Question 18.
Mathematical PRACTICE 6 Explain to a Friend A sunflower costs $6. Evelyn wants to buy 2. Does she have enough money if she has three $5 bills? Explain.
Answer:
Given that,
The cost of the sunflower is $6.
She has three $5 bills it means $5 + $5 + $5 = $15.
Evelyn wants to buy 2 sunflowers.
The cost of 2 sunflowers are 2 x $6 = $12.
Therefore Evelyn has enough money to buy the sunflowers.
Question 19.
There are 82 members in a band. Part of the band divides into 9 equal groups of 5. How many members are not in a group of 5?
Answer:
Given that,
There are 82 members in a band.
The band divides into 9 equal groups of 5.
The members in a group of 5 are 9 x 5 = 45.
The members not in a group are 82 – 45 = 37.
Therefore there are 37 members not in a group.
HOT problems
Question 20.
Mathematical PRACTICE 2 Reason Circle the strategy that will not help you find 6 × 5. Explain.
Answer:
array means the arrangements of objects or pictures of numbers in rows and columns.
6 x 5 means the 6 rows of 5 it is an array.
Question 21.
? Building on the Essential Question What do you notice about all the products of 5? Use the multiplication table if needed.
Answer:
The all the product of 5 have the same difference it is 5.
The multiplication table of 5 is
5 x 1 = 5.
5 x 2 = 10.
5 x 3 = 15.
5 x 4 = 20.
5 x 5 = 25.
5 x 6 = 30.
5 x 7 = 35.
5 x 8 = 40.
5 x 9 = 45.
5 x 10 = 50.
McGraw Hill My Math Grade 3 Chapter 6 Lesson 4 My Homework Answer Key
Practice
Write an addition sentence to help find each product.
Question 1.
3 × 5 = ___
Answer:
3 x 5 = 15.
The addition sentence is 5 + 5 + 5 = 15.
Question 2.
8 × 5 = ___
Answer:
8 x 5 = 40.
The addition sentence is 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 40.
Question 3.
5 × 5 = ____
Answer:
5 x 5 = 25.
The addition sentence is 5 + 5 + 5 + 5 + 5 = 25.
Write a multiplication sentence for each array.
Question 4.
1 row of 5
Answer:
1 row of 5 is 1 x 5 = 5.
Multiply 1 with 5 then you get 5.
Question 5.
5 rows of 4
Answer:
5 rows of 4 is 5 x 4 = 20.
Multiply 5 with 4 then you get 20.
Question 6.
5 rows of 9
Answer:
5 rows of 9 is 5 x 9 = 45.
Multiply 5 with 9 then you get 45.
Problem Solving
Question 7.
Each pair of tennis shoes costs $25. If Andrea has four $5-bills, does she have enough money to buy one pair? Write a number sentence. Then solve.
Answer:
Given that,
Each pair of tennis shoes costs $25.
If Andrea has four $5-bills. It means $5 + $5 + $5 + $5 = $20.
$25 – $20 = $5.
Therefore she don’t have enough money to buy one pair.
Question 8.
For each balloon game you win at the fair, you get 5 tickets. Jamal won 9 balloon games. Gary won 6 balloon games. Do they have enough tickets altogether for a prize that is worth 100 tickets? Explain.
Answer:
Given that,
Each balloon = 5 tickets.
Jamal won 9 balloons. It means 9 x 5 = 45 tickets.
Gary won 6 balloons. It means 6 x 5 = 30 tickets.
The total tickets they won are 30 + 45 = 75 tickets.
The prize worth is 100 tickets.
Therefore they have no enough tickets.
Question 9.
Mathematical PRACTICE 1 Make Sense of Problems For a craft, each student will need 5 rubber bands. There are 8 students. Rubber bands come in bags of 9. How many bags will be needed? How many rubber bands will be left over?
Answer:
Given that,
Each student will need 5 rubber bands.
There are 8 students.
The needed rubber band bags are 8.
Rubber bands come in bags of 9.
Therefore are are 1 rubber band will left over.
Test Practice
Question 10.
Shawn has 4 nickels. How many walnuts can he buy if he spends all 4 nickels?
A. 1 walnut
B. 4 walnuts
C. 5 walnuts
D. 20 walnuts
Answer:
Given that,
Shawn has 4 nickels.
1 nickel equal to 5 cents.
4 x 5 = 20 cents.
The cost of each walnut is 5 cent.
So, Shawn can buy 4 walnuts.
Option B is the correct answer.