without a reference to the problem to solve, its not unambiguously to solve.
6/2(1+2) is the same as 6 / 2 * 3. There's no rule, whats to calculate first.
So the formula could interpreted as :
(6 / 2) * 3 = 9
or
6 / (2 * 3) = 1
without a reference to the problem to solve, its not unambiguously to solve.
6/2(1+2) is the same as 6 / 2 * 3. There's no rule, whats to calculate first.
So the formula could interpreted as :
(6 / 2) * 3 = 9
or
6 / (2 * 3) = 1
ok, should be 9
look here:
9 is only true for this particular problem. If you replace let's say "2" with "x" in the parenthesis and solve for "x" having "9" on the right hand side. You never get x = 2; it will be 1.6666..
So I never teach my students this way as it is not consistent. Correct way is, if there appear a parenthesis in the expression it has priority over division and need to be solved first. This way correct answer is 1.
Which also stands if you replace "2" by x and solve for "1" on the right hand side.
makes sense
windows calc and my ti30 got 9 as result
Try using scientific calculator ! :)
The TI-30 is a scientific calculator.
wait
you could actually go as far and argue that 6/2 is a fraction and thus always a unit! Maybe there is even a rule about it somewhere. I guess it is the reason why you don't see the ÷ in advanced math.
The best answer! Itself it is not a problem as there is no need to put (1 + 2), as it everybody knows that it is 3 from first grade.