This Math quiz is called 'Integers - Working with Negative Numbers' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.
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This quiz focuses on negative numbers (or integers) which are those less than zero.
Integers are whole numbers. This means any number that is not a decimal or a fraction. For example: the number “25” is an integer but the number “1/2” is not because it is a fraction, nor is “.01” because it is a decimal.
There are two kinds of integers - positive and negative. A positive number is any number with a value of 0 and up. A negative number is a number with a value of less than “0.”
For example, let’s look at the following problem:
17 - 19 = ?
As 19 is a number that is greater than (>) 17 our answer will bring us below the number of “0”. To show that a number is less than “0” a minus symbol “-” is used in front of the integer. So in revisiting the above problem, the answer would look like this:
17 - 19 = -2
The “-2” is a negative integer.
When adding a positive integer with a negative integer it is the same thing as subtracting them. For example: 8 + (-6) = is rewritten as 8 - 6 = 2. To show that an integer is a negative number in a math problem it is surrounded by parentheses.
When subtracting negative integers it is the same thing as adding them. For example 10 - (-5) = is rewritten as 10 + 5 = 15.
When adding a negative integer with another negative integer it is the same as adding positive integers. For example: (-30) + (-20) = 30 + 20 = 50. The minus symbol “-” is then placed before the answer so the answer is -50.
Two like signs become a positive (“-” “-” = “+”)
Two unlike signs become a negative (“-” “+” = “-” and “+” “-” = “-”)
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