Multiplying Integers If the factors have the same sign, then the product is POSITIVE. EX. (− 7)(− 4) =28 If the factors have different signs, then the product is NEGATIVE. EX. (− 7)(4) =− 28
Tricks Multiplying Multiple INTEGERS When there an ODD number of negative factors, the answer is NEGATIVE. EX. (− 3)(4)(− 2)(− 3) =− 72 When there an EVEN number of negative factors, the answer is POSITIVE. EX. (− 2)(− 8)(3)(10) =480
Dividing Integers If the dividend and divisor have the same sign, then the quotient is POSITIVE. EX. − 32 ÷ (− 4) =8 If the dividend and divisor have different signs, then the quotient is NEGATIVE. EX. − 81 ÷ 9=(− 9)
Rules for dividing Fractions Change all mixed numbers to IMPROPER FRACTIONS. Multiply the first term by the RECIPROCAL of the second term. (KEEP, CHANGE, FLIP) Dividing Fractions: Keep, Change, Flip
A football team loses 7 yards on each of 3 consecutive plays. Find the total change in yards from where the team started.
CW: Complete the Adding, Subtracting, Multiplying and Dividing Rational Numbers worksheet.