# 180 Days of Math for Sixth Grade Day 129 Answers Key

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## 180 Days of Math for Sixth Grade Answers Key Day 129

Directions: Solve each problem.

Question 1.
Double 39.
Explanation:
Double means the sum the same number.
39 + 39 = 78

Question 2.

Explanation:
Multiply means to add equal groups.
When we multiply, the number of things in the group increases.
The two factors and the product  are parts of a multiplication.
So, 40 × 20 = 800
The numbers 40 and 20 are the factors,
800 is the product.

Question 3.
What is the quotient when 791 is divided by 9?
Quotient = 87
Remainder = 8
Explanation:

Question 4.
List the first five multiples of 8.
8, 16, 24, 32, 40
Explanation:
Multiples of a number are obtained by multiplying it by natural numbers.
8 x 1 = 8
8 x 2 = 16
8 x 3 = 24
8 x 4 = 32
8 x 5 = 40

Question 5.
Write 2.38 as a mixed number.
2$$\frac{19}{50}$$
Explanation:
The number 2.38 can be written using the fraction,
= $$\frac{238}{100}$$
= $$\frac{119}{50}$$ when reduced to lowest terms.
It is also equal to 2$$\frac{19}{50}$$ when written as a mixed number.

Question 6.
64 ÷ 4 × 2 ÷ 8 = __________
Explanation:
64 ÷ 4 × 2 ÷ 8
= (64 ÷ 4) × 2 ÷ 8
= 16 x 2 ÷ 8
= 32 ÷ 8
= 4

Question 7.
36 ÷ 6 = 2 ×
Explanation:
36 ÷ 6 = 2 ×
Let the unknown number be x
36 ÷ 6 = 2x
6 = 2x
x = 3

Question 8.
Distribute.
12(8 – n) = __________
96 – 12n
Explanation:
12(8 – n)
n is the variable in the given equation.
Expand the equation as,
(12 x 8 – 12 x n)
= 96 – 12n

Question 9.
What is the volume of a container (in cm3) that holds 350 mL?
350 cm3
Explanation:
Capacity is the amount of a container can hold
capacity are litre (L) and millilitre (mL).
1000 mL = 1L, so 1L = 1000 cm3.
350 ml = 350 cm3

Question 10.
Do parallel lines meet at 90°?
No, parallel lines meet at 90°
Explanation:
parallel lines never meet at any point,
they extend to distant end.

Question 11.

How many more cookies did Lucas bake than Mindy?
Explanation:

Lucas bakes 7 x 12 = 84 cookies
Mindy bakes 5 x 12 = 60
Number of more cookies Lucas bakes = 84 – 60 = 24

Question 12.
Compare an octagonal pyramid with an octagonal prism.

 Faces Edges Vertices Octagonal Pyramid Octagonal Prism

Explanation:
Octagonal prism has two octagons are the bases of prism.
Eight rectangles are the lateral faces.
An octagonal pyramid is a pyramid with a base that’s a polygon with eight sides,
and triangular faces, or sides, that meet at a point directly above the bottom.

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