10
No, taking ½ of a number is the same as dividing it by 2. Dividing a number by ½ is the same as multiplying it by 2.
1000
That is the definition of reciprocal.
no, dividing a number is halving it, multiplying iy by 2 is doubling it
10
Because multiplying or dividing them by the same NON-ZERO number does not alter their ratio.
because there the same
it is the same as multiplying by 0.4
Because doing so is equivalent to multiplying or dividing by x/x, which can be cancelled down to 1.
No, taking ½ of a number is the same as dividing it by 2. Dividing a number by ½ is the same as multiplying it by 2.
Dividing by a non-zero rational number is the same as multiplying by its reciprocal.
1000
because of mathematical equivalence: it doesn't change the result
Multiplying by -1/3
1/2
The answer is positive.