Because it isn’t.
6 multiplied by 2/5 is 2 2/5 or 2.4
5/6 x 12/5 = 2
2.5
5
You can check this by getting common numerators or denominators for the two fractions. Common numerators: The numerators are 3 and 5. These can be multiplied together to get 15, the new numerator. To get the numerator to equal 15, 3/2 is multiplied by 5/5 to become 15/10. To get the numerator to equal 15, 5/3 is multiplied by 3/3 to become 15/9. 15/9 does not equal 15/10. Common denominators: The denominators are 2 and 3. These can be multiplied together to get 6, the new denominator. To get the denominator to equal 6, 3/2 is multiplied by 3/3 to become 9/6. To get the denominator to equal 6, 5/3 is multiplied by 2/2 to become 10/6. 9/6 doesn't equal 10/6. Both methods show that 3/2 does not equal 5/3.
[15 - (5 + 6)]*2 = [15 - 11]*2 = 4*2 = 8
Change 2 and 2/5 to 12/5 12/5 * 5/6 = 60/30 which is 2
5
One multiplied by -6 is -6. If you add 1 and 1, you get 2 and multiplied by -6 the answer is -12.
10
5 multiplied by 6 is 30.
If you are asking 80/2, +6*5 i'll do that. You have specified you divide by 2 first. 80/2 is 40. 40+(6*5) is 70