teach this problem
-2-1*3.2+4.3*(-1.5)
i keep getting -3.92 and i know that its incorrect
order of operations:
(1)DO operations inside parentheses
(2)Distribute powers
(3)Multiply and Divide left to right
(4)Add and Subtract left to right
so:
(-2-1)*(3.2)+4.3*(-1.5)
do operations inside parentheses first
(-3)*(3.2)+4.3*(-1.5)
then do multiplication left to right
-9.6+-6.45
then add
-16.05
that's your answer!
-11.65 if the first part of the problem is simply: -2-1*(3.2) and not (-2-1)*(3.2)as I have shown above
mybad, its -2.1*3.2+4.3*(-1.5)
Sorry about that
then its -13.17
understand why?
i don't get how that works. can you please explain
-2.1*3.2+4.3*(-1.5)
(1)First perform any calculations inside parentheses.
(2)Next perform all multiplications and divisions, working from left to right.
(3)Lastly, perform all additions and subtractions, working from left to right.
So:
first multiply terms left to right since you don't have any calculations within parentheses
-2.1*3.2+4.3*(-1.5)= -6.72 + -6.45
then add the two terms together
-6.72+ -6.45 = -13.17