ADDING SUBTRACTING MULTIPLYING AND DIVIDING INTEGERS NO CALCULATORS

ADDING, SUBTRACTING, MULTIPLYING, AND DIVIDING INTEGERS NO CALCULATORS!!!!!!!

Integers are the whole numbers and their opposites (no decimal values!) Example: -3 is an integer Example: 4 is an integer Example: 7. 3 is not an integer

How do we add integers Adding integers comes down to two rules Rule 1: If the signs (+ or -) are the same, simply add the numbers and keep that sign Example: -4 + -8 = -12 (because 4 + 8 is 12) Rule 2: If the signs are different, simply subtract the number closest to zero from the number further away from zero and keep the sign of the number furthest from zero Example: 3 + -7 = -4 (because 7 – 3 is 4)

How do we subtract integers Subtraction and addition are friends, so subtraction just changes itself to addition by changing the second number’s sign. Make sure you follow the addition rules after that. Example: -4 – 6 means -4 + -6 = -10

Multiplication and Division They, too, are friends so they share the rules Rule 1: When the signs are the same (either + + or - -) simply do the operation and the answer will be positive Example: -25 ÷ -5 = 5 (since it is - -) Rule 2: When the signs are different (either + or - +) simply do the operation and the answer will be negative Example: -4 • 8 = -32 (since it is - +)

You try some -5 + 8 3 -11 – 4 -15 7 • -4 -28 -36 ÷ 9 -4 -3 + 2 -1 15 – (-2) 17 -8 • -3 24 12 ÷ -4 -3 -11 + -4 -15 -1 – (-6) 5 -11 • 2 -28 ÷ -7 4