# 180 Days of Math for Sixth Grade Day 20 Answers Key

By accessing our 180 Days of Math for Sixth Grade Answers Key Day 20 regularly, students can get better problem-solving skills.

## 180 Days of Math for Sixth Grade Answers Key Day 20

Directions Solve each problem.

Question 1.

154+20 = 174.

Explanation:
The addition of 154 and 20 is 174.

Question 2.
-5 × -5 = ____
-5 × -5 = 25.

Explanation:
The multiplication of -5 × -5 is 25.

Question 3.
840 ÷ 10 = ______
840 ÷ 10 = 84.

Explanation:
The division of 840 by 10 is 84.

Question 4.
Find the smallest possible two-digit number using the digits 2, 7, and 3.
_______________________
The smallest possible two-digit is 27.

Explanation:
The two-digit that are formed by the digits 2,7 and 3 is 27, 72, 23, 32, 37, 73. So the smallest possible two-digit is 27.

Question 5.
Write 3$$\frac{2}{5}$$ as an improper fraction.
_______________________
$$\frac{17}{5}$$

Explanation:
We can see the mixed fraction number which is 3$$\frac{2}{5}$$, so in improper fraction it will be $$\frac{17}{5}$$.

Question 6.
4 + 7 • 9 = ____
4 + 7 • 9 = 67.

Explanation:
Given the expression is 4 + 7 • 9, here  we will follow BODMAS rule and solve the multiplication part first and then we will solve addition part. So
4 + (7 • 9) = 4 + 63
= 67.

Question 7.
71 48 = 23
71 – 48 = 23.

Explanation:
Here, we will perform subtraction for the above expression. So the expression will be 71 – 48 = 23.

Question 8.
Solve for r when $$\frac{r}{4}$$ = 0.75.
r = _____
r = 3.

Explanation:
Given the expression is $$\frac{r}{4}$$ = 0.75,
So r will be
r = 0.75×4
= 3

Question 9.
What time is 16 minutes after 9:53 A.M.?
_______________
10:09 AM.

Explanation:
Given the time is 9:53 AM, after 16 minutes it will be 10:09 AM.

Question 10.
Is this angle acute, obtuse, or reflex?
______________

Acute angle.

Explanation:
As the angle less than 60 degrees, so the angle will be acute angle.

Question 11.
The numbers 0 – 9 are on the calculator. If you randomly push one number on the calculator, what is the probability that you will push 8?
_______________________
$$\frac{1}{10}$$.

Explanation:
The probability of the push 8 will be $$\frac{1}{10}$$.

Question 12.
On a skiing trip, there are five people but only three pairs of skis. How many different groups of three could ski?
_______________________
9 groups of 3.

Explanation:
Given that there are five people but only three pairs of skis, let the five people be A, B, C, D, E. So the different groups of three could be
A, B, C,
A, D, E,
A, B, D,
A, B, E,
B, C, D,
B, D, E,
D, E, A,
E, A, B,
E, D, C,

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