Go through the Math in Focus Grade 3 Workbook Answer Key Chapter 6 Practice 4 Multiply by 8 to finish your assignments.
Math in Focus Grade 3 Chapter 6 Practice 4 Answer Key Multiply by 8
Complete the multiplication fact. Then show on the number line.
Question 1.
3 × 8 = ____
Answer:
3 × 8 = 24.
Explanation:
Here we have represented the number line of 3 × 8 which is 24, as it has 3 jumps of 8.
Complete the multiplication fact. Then shade to show on the area model.
Question 2.
6 × 8 = ____
Answer:
6 × 8 = 48.
Explanation:
The model of 6 × 8 is
Fill in the missing numbers.
Question 3.
8 eights = 8 × ___
Answer:
8 eights = 8 × 8 64.
Explanation:
Given that 8 eights which means 8 × 8 are 64.
So the missing digit is 8.
Question 4.
3 eights = 8 × ____
Answer:
3 eights = 8 × 3 = 24.
Explanation:
Given that 3 eights which means 3 × 8 are 24.
So the missing digit is 3.
Question 5.
6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = 8 × ____
Answer:
6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = 8 × 6 = 48.
Explanation:
Given that 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6, and we can write this as 8 × 6 which is 64.
So the missing digit is 6.
Question 6.
8 + 8 + 8 + 8 + 8 + 8 = 6 × ____
Answer:
8 + 8 + 8 + 8 + 8 + 8 = 6 × 8 = 48.
Explanation:
Given that 8 + 8 + 8 + 8 + 8 + 8, and we can write this as 6 × 8 which is 48.
So the missing digit is 8.
Question 7.
5 × 8 = 8 × ____
Answer:
5 × 8 = 8 × 5 = 40.
Explanation:
Here, by using commutative property we can write 5 × 8 = 8 × 5 which is 40.
Question 8.
5 eights = 8 + 8 + ___ + ___ + ____
Answer:
5 eights = 8 + 8 + 8 + 8 + 8 = 40
Explanation:
Given that 5 eights which means 5 × 8 are 40.
So 8 + 8 + 8 + 8 + 8 = 40.
Multiply. Use multiplication facts you know to find other multiplication facts.
Question 9.
8 × 4 = 10 groups of 4 – ___ groups of 4
= ___ – ____
= ____
Answer:
8 × 4 = 10 groups of 4 – 2 groups of 4
= 32.
Explanation:
Given that
8 × 4 = 10 groups of 4 – 2 groups of 4 which is
= 40 – 16
= 32.
Question 10.
10 × 8 = ___
8 × 8 = ___ groups of 8
= 10 groups of 8 – ____ groups of 8
= ____ – ____
= ____
Answer:
10 × 8 = 80,
8 × 8 = 8 groups of 8 = 64.
Explanation:
Given that 10 × 8 = 80 and
8 × 8 = 8 groups of 8
= 10 groups of 8 – 2 groups of 8
= 80-16
= 64.
Question 11.
5 × 8 = ____
7 ×8 = ___ groups of 8
= 5 groups of 8 + ___ groups of 8
= ___ + ____
= ___
Answer:
5 × 8 = 40.
7 ×8 = 7 groups of 8 = 56.
Explanation:
Given that 5 × 8 which is 40 and
7 ×8 = 7 groups of 8 which is
= 5 groups of 8 + 2 groups of 8
= 40+16
= 56.
Multiply and match.
Question 12.
Answer:
Question 13.
What is the missing multiplication fact? ___
Answer:
8×1 =8.
Explanation:
The missing multiplication fact is 8×1 which is 8.
Solve.
Example
An octagon has 8 equal sides.
How many sides do 5 octagons have?
5 × 8 = 40
5 octagons have 40 sides.
Question 14.
8 children make up a team.
How many children make up 7 teams?
____ children make up 7 teams.
Answer:
56 children make up 7 teams.
Explanation:
Given that 8 children make up a team. So the number of children makeup 7 teams is
8×7 which is 56 children.
Question 15.
A chocolate cake has 8 cherries.
How many cherries do 6 such cakes have?
6 such cakes have ___ cherries.
Answer:
6 such cakes have 48 cherries.
Explanation:
Given that a chocolate cake has 8 cherries. So for 6 cakes, there will be
6×8 which is 48 cherries.