Integer Rules

When adding integers with the same sign you ________________.

• Subtract and keep the sign of the larger number.

• Add and keep the sign.

-21 + 14

• positive

• negative

In addition if the signs are different

• add and take sign of number with greater absolute value

• subtract and take sign of number with greater absolute value

• the sum is always positive

• the sum is always negative

When subtracting integers you must________________________.

• Subtract like normal.

• Keep the first sign, keep it a subtracting problem, and find the reciprocal of the second integer.

• Keep the first sign, keep it a subtracting problem, and find the opposite of the second integer.

• Keep the first sign, change it to addition, find the opposite of the second integer, use your adding rules.

Match the following

• -12

• 5 - (-7)

• 8

• -2 + 10

• 3

• -4 - 4

• -8

• -16 +4

• 12

• 10 + (-7)

Match the following

• 4

• -8

• 3

• 6-(+3)

• 6

• 7+(-3)

• -4

• -4+10

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

• opposite

• subtracting

• same sign

• adding

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

• subtract, positive

• -1239 + 904

• add, negative

• -762 + (-481)

• subtract, negative

• -717 + 927

• add, positive

• 3 + 5

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

• opposite

• inverse

Select the equivalent expressions:

-10 - 5

• -5+ (-10)

• -10 + 5

• -10 + (-5)

• 10 + 5