Question

i need this explanation ​

Answer 1

Answer:

I think this is subtraction method

Answer 2

Answer:

This is Substraction.

Subtraction Mean:

Subtraction is an arithmetic operation that represents the operation of removing objects from a collection. The result of a subtraction is called a difference. Subtraction is signified by the minus sign, −.

For Example:-

7-3=4(7 subtract with 3 =4),4-1=3(4 subtact with 1 =3)

HOPE IT WILL HELP YOU.