Addition and Subtraction of Integers

What is an integer?

• Composed only by negative and positive natural numbers

• It is composed of whole numbers, decimals, and fractions

• Composed of positive and negative natural numbers and a number zero

• It is composed of positive and negative natural numbers, a number zero, decimals, and fractions

Which of the following is NOT an example integers?

• 104

• 0

• -16

• -2/5

Integer is often denoted by a boldface _?

• R

• i

• N

• Z

The following are the rules of adding integers, EXCEPT.

• In adding integers with similar sign, just add the numbers and copy the sign

• Apply Keep, Change, Change process

• In adding integers with different sign, just subtract the numbers and copy the sign of the larger number

What is the sum of -14 and 8?

• 6

• -22

• -6

• 22

The "K" In the KCC process stands for_?

• Keep the sign of the minuend

• Keep the sign of the subtrahend

• Keep the process

• Keep the sign of the final answer

In adding and subtracting integers, the sign of the numbers must be considered.

• TRUE

• FALSE

Answer explanation

True, because we need to consider the sign of the numbers to apply the appropriate rule or process to use.

-1.02, 0.54, and 1/3 are examples of integers.

• TRUE

• FALSE

Answer explanation

Fractions and decimals are not considered as integers

The KCC process is applicable in both addition and subtraction of integers.

• TRUE

• FALSE

Answer explanation

The KCC process is only applicable in subtraction of integers. In subtracting integers, we need to apply first the KCC process. Keep the sign of the minuend, change the operation into addition, and change the sign of the subtrahend.

Subtracting 15 and -24, the results will be 39.

• TRUE

• FALSE

Answer explanation

Applying the KCC process,

15 - (-24)

= 15 + 24

= 39