Question

Identify the operations (addition, subtraction, division, multiplication) in forming the following expressions and tell how the expressions have been formed.

(a) z + 1, z − 1, y + 17, y − 17 (b)

(c) 2y + 17, 2y − 17 (d) 7m, − 7m + 3, − 7m − 3

Answer 1

(a) Addition as 1 is added to z.

Subtraction as 1 is subtracted from z.

Addition as 17 is added to y.

Subtraction as 17 is subtracted from y.

(b) Multiplication as y is multiplied with 17.

Division as y is divided by 17.

Multiplication as z is multiplied with 5.

(c) Multiplication and addition

y is multiplied with 2, and 17 is added to the result.

Multiplication and subtraction

y is multiplied with 2, and 17 is subtracted from the result.

(d) Multiplication as m is multiplied with 7.

Multiplication and addition as m is multiplied with −7, and 3 is added

to the result.

Multiplication and subtractionas m is multiplied by −7, and 3 is

subtracted from the result.