Geometrical meaning of addition and subtraction of complex number

Subtraction of complex numbers

Addition and subtraction of decimals

Addition and subtraction of like fractions

Addition and subtraction of like fractions

Addition and subtraction of unlike fractions

Addition & Subtraction of Binary Numbers

Give an example to show that subtraction of complex number is not commutative.

Based on addition/subtraction of prime numbers These questions have a pattern of add1tion/subtraction of prime numbers. 32, 19, 8, ?

Based on addition/subtraction of squares of natural numbers These questions consist of a pattern based on addition /subtraction of squares of natural numbers 71, 55, 46, 42, ?

Based on addition/subtraction of squares of natural numbers These questions consist of a pattern based on addition /subtraction of squares of natural numbers 1, 2, 6, 15, 31, ?