7th Grade Midterm Exam Review

Front

What is the absolute value of a number?

Back

The absolute value of a number is its distance from zero on the number line, regardless of direction. For example, the absolute value of -5 is 5.

Front

Translate the expression: 'Twice a number n'

Back

2n

Front

What is the result of subtracting a number from another number?

Back

To subtract a number from another, you take the first number and decrease it by the second number. For example, 10 - 3 = 7.

Front

How do you solve for x in the equation: 5 = -4 + x/9?

Back

To solve for x, first isolate x by adding 4 to both sides, giving 9 = x/9. Then multiply both sides by 9 to find x = 81.

Front

What is the process of dividing fractions?

Back

To divide fractions, multiply the first fraction by the reciprocal of the second fraction. For example, (a/b) ÷ (c/d) = (a/b) * (d/c).

Front

What is the value of 3.2 - 2.79?

Back

0.41

Front

What does it mean to translate a verbal expression into an algebraic expression?

Back

Translating a verbal expression into an algebraic expression involves converting words into mathematical symbols. For example, '18 subtracted from twice a number' translates to 2n - 18.

Front

What is the reciprocal of a number?

Back

The reciprocal of a number is 1 divided by that number. For example, the reciprocal of 5 is 1/5.

Front

How do you simplify the expression -2 3/5 ÷ -8?

Back

Convert -2 3/5 to an improper fraction (-13/5) and then divide by -8 (which is -8/1). The result is 13/40.

Front

What is the definition of a variable in algebra?

Back

A variable is a symbol, often a letter, that represents an unknown value in mathematical expressions or equations.