Grade 8 - Review

Front

What is scientific notation?

Back

A way of expressing numbers that are too large or too small to be conveniently written in decimal form, typically in the form a x 10^n, where 1 ≤ a < 10 and n is an integer.

Front

Which of the following is correct scientific notation? 20.35 x 10^4, .2035 x 10^4, 2035^4, 2.035 x 10^4

Back

2.035 x 10^4

Front

How do you solve for x in the equation 8x - 10 = -34?

Back

Add 10 to both sides to get 8x = -24, then divide by 8 to find x = -3.

Front

What is the result of -3(-4)?

Back

12

Front

How do you rewrite w^-13 using a positive exponent?

Back

1/w^13

Front

What is the definition of a variable in mathematics?

Back

A symbol used to represent an unknown value, often denoted by letters such as x, y, or z.

Front

What is the order of operations in mathematics?

Back

The order is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse (c) is equal to the sum of the squares of the lengths of the other two sides (a and b): a² + b² = c².

Front

What is a prime number?

Back

A natural number greater than 1 that has no positive divisors other than 1 and itself.