add and subtract integers pretest

Front

What is the result of adding two integers with different signs, such as -13 and -5?

Back

When adding integers with different signs, subtract their absolute values and take the sign of the integer with the larger absolute value. In this case, -13 + 5 = -8.

Front

How do you represent the operation of subtracting a negative integer, such as 8 - (-3)?

Back

Subtracting a negative integer is the same as adding its positive counterpart. Therefore, 8 - (-3) = 8 + 3 = 11.

Front

What is the opposite of an integer, and what is the opposite of -8?

Back

The opposite of an integer is the integer that is the same distance from zero but in the opposite direction. The opposite of -8 is 8.

Front

What is the result of -45 + 9?

Back

To add a negative integer and a positive integer, subtract their absolute values and take the sign of the integer with the larger absolute value. -45 + 9 = -36.

Front

What does the expression -12 + 5 = -7 represent in terms of counters?

Back

This expression can be represented by having 12 negative counters and 5 positive counters, resulting in a net of 7 negative counters.

Front

What is the rule for adding two positive integers?

Back

When adding two positive integers, simply add their absolute values. The result is always positive.

Front

What is the rule for adding two negative integers?

Back

When adding two negative integers, add their absolute values and the result is negative.

Front

How do you subtract two integers?

Back

To subtract an integer, add its opposite. For example, a - b is the same as a + (-b).

Front

What is the result of -7 - 3?

Back

To subtract a positive integer from a negative integer, add their absolute values and keep the negative sign. -7 - 3 = -10.

Front

What is the result of 15 - 20?

Back

When subtracting a larger positive integer from a smaller positive integer, the result is negative. 15 - 20 = -5.