Variables

Which represents the unknown value in the following statement? 
7 + j = 15

• 7
• +
• j
• 12

Which of the following shows an expression?

• n + 7
• n - 4 = 8
• n
• 7n

Which of the following shows an equation?

• 7t
• t ÷ 7 = 7
• t
• 3t > 15

Which expression below shows:
6 greater than a number (n)

• 6 - n
• n - 6
• 6n
• n + 6

Which expression below shows:
a number (n) split equally into 4 groups

• 4 ÷ n
• n ÷ 4
• 4n
• n + 4

Which represents the unknown value in the following statement?

s + 3 = 12

• s

• 12

• +

• 3

Which equation represents "a number, x, decreased by 51 is 213?"

• x + 51 = 213

• x - 51 = 213

• x • 51 = 213

• x ÷ 51 = 213

When p stands for the number of pies in one full box.

The number of pies in a full box and nine extra can be represented by...

• p + 9

• p ÷ 9

• 9p

• p - 9

In the expression m- 5, the letter m represents

• an unknown number
• a number sentence
• a subtraction symbol
• an addition symbol

A(n) _______________ represents an unknown quantity or number

• Expression

• Factor

• Variable

• Equation