Integer Operations and Rules

In Addition if the signs the are the same we....

• Add

• Subtract

• Keep Common Sign

• Take sign of number with greater absolute value

In addition if both numbers are positive

• The sum is positive

• The sum is negative

• Add

• Subtract

In addition if the signs are different

• add

• subtract

• the sum is always positive

• the sum is always negative

• take sign of number with greater absolute value

In addition if the 1st number is positive and 2nd negative

• The answer is always positive

• The answer is always negative

• add

• subtract

• take sign of number with greater absolute value

Match the following

• -8

• -7 + (-1)

• 1

• -4 - (-6)

• 13

• 10 - 9

• 2

• 8 - (-5)

• -4

• 1 - 5

Match the following with the correct operation and sign of the answer.

• subtract, positive

• 3 + 5

• add, negative

• -1239 + 904

• add, positive

• -762 + (-481)

• subtract, negative

• -717 + 927

When you subtract a negative number we add its ​ ​ (a)   .

• opposite

• inverse

The integers rules are the same for which 2 operations

• addition

• subtraction

• multiplication

• division

If I am subtracting integers, I need to change the problem to addition by ​ ​ (a)   ​ the ​ (b)   ​

• opposite

• subtracting

• same sign

• adding

A submarine was 1800 ft below sea level. It dove another 1500 feet deeper. Which integer represents its location? 

• -300

• -1300

• -3300

• 300