| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.03 |
| Score | 0% | 61% |
This property states taht the order of addition or multiplication does not mater. For example, 2 + 5 and 5 + 2 are equivalent.
distributive |
|
associative |
|
commutative |
|
PEDMAS |
The commutative property states that, when adding or multiplying numbers, the order in which they're added or multiplied does not matter. For example, 3 + 4 and 4 + 3 give the same result, as do 3 x 4 and 4 x 3.
If there were a total of 400 raffle tickets sold and you bought 12 tickets, what's the probability that you'll win the raffle?
| 5% | |
| 3% | |
| 11% | |
| 8% |
You have 12 out of the total of 400 raffle tickets sold so you have a (\( \frac{12}{400} \)) x 100 = \( \frac{12 \times 100}{400} \) = \( \frac{1200}{400} \) = 3% chance to win the raffle.
Which of these numbers is a factor of 20?
| 4 | |
| 8 | |
| 16 | |
| 6 |
The factors of a number are all positive integers that divide evenly into the number. The factors of 20 are 1, 2, 4, 5, 10, 20.
Solve 4 + (4 + 3) ÷ 2 x 2 - 32
| 2 | |
| \(\frac{3}{8}\) | |
| 1 | |
| 4 |
Use PEMDAS (Parentheses, Exponents, Multipy/Divide, Add/Subtract):
4 + (4 + 3) ÷ 2 x 2 - 32
P: 4 + (7) ÷ 2 x 2 - 32
E: 4 + 7 ÷ 2 x 2 - 9
MD: 4 + \( \frac{7}{2} \) x 2 - 9
MD: 4 + \( \frac{14}{2} \) - 9
AS: \( \frac{8}{2} \) + \( \frac{14}{2} \) - 9
AS: \( \frac{22}{2} \) - 9
AS: \( \frac{22 - 18}{2} \)
\( \frac{4}{2} \)
2
In a class of 25 students, 9 are taking German and 11 are taking Spanish. Of the students studying German or Spanish, 5 are taking both courses. How many students are not enrolled in either course?
| 10 | |
| 15 | |
| 14 | |
| 19 |
The number of students taking German or Spanish is 9 + 11 = 20. Of that group of 20, 5 are taking both languages so they've been counted twice (once in the German group and once in the Spanish group). Subtracting them out leaves 20 - 5 = 15 who are taking at least one language. 25 - 15 = 10 students who are not taking either language.