An estimate is related to a number, not an arithmetic operation. Having said that, the estimate MUST take account of the context of the operations (+-*/).
Either or both.
For multiplication or division, the only reasonable estimate is -2.
For addition or subtraction, 1 but for multiplication or division, 1.25
Multiplication is the inverse operation to division.
Division is the inverse operation to multiplication. Division by a number (other than zero) is the same as multiplication by its reciprocal.
"Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction." Therefore multiplication and division are equal.
For multiplication or division, 133.33... or 100*4/3
Division is the inverse operation to multiplication.
Division is the opposite of multiplication.
The result of multiplication is the "product", regardless of what the result of division is called.
Not by necessity, but multiplication and division aredefined for negative numbers.