Math Essentials: 40 flashcards
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1. What is the value of $7 + 5 \times 2$?
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$17$
2. What is the value of $(7 + 5) \times 2$?
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$24$
3. What is the value of $3^2 + 4^2$?
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$25$
4. What is the value of $\sqrt{81}$?
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$9$
5. What is the value of $|-7|$?
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$7$
6. What is the value of $2^3 \times 2^2$?
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$2^5 = 32$
7. What is the value of $\frac{2}{3} + \frac{1}{4}$?
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$\frac{11}{12}$
8. What is the value of $\frac{3}{5} \times \frac{10}{9}$?
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$\frac{2}{3}$
9. What is the value of $\frac{3}{4} \div \frac{2}{5}$?
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$\frac{15}{8}$
10. Convert $0.75$ to a fraction in simplest form.
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$\frac{3}{4}$
11. Convert $\frac{2}{5}$ to a decimal.
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$0.4$
12. Convert $0.6$ to a percentage.
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$60\%$
13. Convert $45\%$ to a decimal.
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$0.45$
14. What is $15\%$ of $200$?
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$30$
15. If a shirt costs $\$40$ and is on sale for $25\%$ off, what is the sale price?
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$\$30$
16. Solve for $x$: $2x + 5 = 13$.
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$x = 4$
17. Solve for $x$: $3(x - 2) = 9$.
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$x = 5$
18. Simplify: $2a + 3a - a$.
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$4a$
19. Expand: $2(x + 3)$.
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$2x + 6$
20. What is the slope of the line passing through $(1, 2)$ and $(3, 6)$?
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$2$
21. What is the area of a rectangle with length $8$ cm and width $5$ cm?
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$40$ cm$^2$
22. What is the perimeter of a square with side length $6$ cm?
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$24$ cm
23. What is the area of a triangle with base $10$ cm and height $6$ cm?
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$30$ cm$^2$
24. What is the circumference of a circle with radius $7$ cm? (Use $\pi \approx \frac{22}{7}$)
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$44$ cm
25. What is the area of a circle with radius $7$ cm? (Use $\pi \approx \frac{22}{7}$)
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$154$ cm$^2$
26. What is the Pythagorean theorem?
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$a^2 + b^2 = c^2$, where $c$ is the hypotenuse of a right triangle.
27. In a right triangle, if the legs are $3$ and $4$, what is the hypotenuse?
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$5$
28. What is the sum of the interior angles of a triangle?
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$180^\circ$
29. What is the mean of the numbers $2, 4, 6, 8, 10$?
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$6$
30. What is the median of the numbers $3, 7, 5, 9, 1$?
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$5$
31. What is the mode of the numbers $2, 3, 3, 5, 7$?
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$3$
32. What is the probability of rolling a $4$ on a fair six-sided die?
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$\frac{1}{6}$
33. What is the probability of rolling an even number on a fair six-sided die?
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$\frac{1}{2}$
34. What is the value of $5!$ (5 factorial)?
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$120$
35. What is the next prime number after $7$?
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$11$
36. What is the greatest common divisor (GCD) of $12$ and $18$?
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$6$
37. What is the least common multiple (LCM) of $4$ and $6$?
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$12$
38. Solve for $x$: $\frac{x}{3} = 7$.
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$x = 21$
39. What is the value of $\frac{1}{2} + \frac{1}{3}$?
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$\frac{5}{6}$
40. What is the value of $0.25 \times 4$?
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$1$
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