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) 17y, y / 17, 5z

(c) 2y + 17, 2y - 17

(d) 7m, -7m + 3, -7m - 3

Answer 1

We have to identify the operations used in the given expressions

(a) z + 1, z - 1, y + 17, y - 17

z + 1

=> 1 is added to z, hence it is addition.

z – 1

=> 1 is subtracted from z, hence it is subtraction.

y + 17

=> 17 is added to y, hence it is addition.

y – 17

=> 17 is subtracted from y , hence it is subtraction.

(b) 17y , y / 17, 5z

17y

=> y is multiplied by 17 , hence it is multiplication.

y / 17

=> y is divided by 17 , hence it is division.

5z

=> z is multiplied by 5, hence it is multiplication.

(c) 2y + 17, 2y - 17

2y + 17

=> y is multiplied by 2 and 17 is added to the result, hence it is multiplication and addition.

2y – 17

=> y is multiplied by 2 and 17 is subtracted from the result, hence it is multiplication and subtraction.

(d) 7m, -7m + 3, -7m - 3

7m

=> m is multiplied by 7, hence it is multiplication.

-7m + 3

=> m is multiplied by -7 and 3 is added to the result, hence it is multiplication and addition

-7m – 3

=> m is multiplied by -7 and 3 is subtracted from the result, hence it is multiplication and subtraction.

Hence we have identified all the operations used in the given expressions.