Service Rep Outcome #12 Writing mathematical expressions and equations A mathematical expression uses math symbols instead of words. Examples: 9 + n means sum of nine and the number n”. “the N 12 means number n decreased by twelve.” – “a 7 x n and 7n both mean times the number “seven n.” n/6 and n ÷ 6 both mean number n divided by “a six.” Underline the correct mathematical expression. The sum of 13 and 26 2) Nine added to negative 5 13 x 26 9 + -5 13 + 26 9 + 5 3) Seven decreased by a number z 4) Ten less than a number x 7 z x 10 – – Z 7 10 x – – Five times the sum of a number x 6) Eight less than the result of and a number d dividing a number a by b 5x ÷ d a/b 8 – 5 x (x ÷ d) a 8 – B Write as mathematical expressions. a number x decreased by eleven the product of 12 and a number g a number t decreased by a number j the product of ten and a number v, divided by 4
Service Rep Outcome #12 Writing mathematical expressions and equations A mathematical expression uses math symbols instead of words. Examples: 9 + n means “the sum of nine and the number n”. N – 12 means “a number n decreased by twelve.” 7 x n and 7n both mean “seven times the number n.” n/6 and n ÷ 6 both mean “a number n divided by six.” Underline the correct mathematical expression. The sum of 13 and 26 2) Nine added to negative 5 13 x 26 9 + -5 13 + 26 9 + 5 3) Seven decreased by a number z 4) Ten less than a number x 7 – z x – 10 Z – 7 10 – x Five times the sum of a number x 6) Eight less than the result of and a number d dividing a number a by b 5x ÷ d a/b – 8 5 x (x ÷ d) a – 8 B Write as mathematical expressions. a number x decreased by eleven the product of 12 and a number g a number t decreased by a number j the product of ten and a number v, divided by 4