Divide by 6... For part E, you should know every ingredient for 1 serving by then, so mu multiply by 10
The first problem is true because with multiplication it doesn't matter which order it is in.
The second problem is false because you will get a different quotient depending on which numbers are on which side of the equation.
Subtract 4, subtract 2x, then divide by -2
Do you mean the #12 and severe to fifths to a decimals if you are then it's 12.57