Question

7+(-8)-(-12)-(-7)+12-20 2 3/4 - (-1 1/2)+(-5/6)-(-3/8)-4 2/3 -19,6-4,6 -6,6-(-12,3) 2,8-5,3 HELP!

Answer 1

7+(-8)-(-12)-(-7)+12-20=7-8+12+7+12-20=0
2 3/4-(-1 1/2)+(-5/6)-(-3/8)-4 2/3=2 3/4+ 1 1/2-5/6+3/8-4 2/3=15/24=5/8
-19,6-4,6=-24,2
-6,6-(-12,3)=-6,6+12,3=5,7
2,8-5,3=-2,5

Answer 2

Let's break down each of these arithmetic expressions step by step:

1. 7 + (-8) - (-12) - (-7) + 12 - 20

   Start by simplifying the negative signs:

   7 + (-8) + 12 + 7 + 12 - 20

   Now, add and subtract the numbers:

   (7 + 12 + 7 + 12) - 8 - 20

   38 - 8 - 20

   Now, subtract:

   38 - 8 = 30 30 - 20 = 10

   So, the answer is 10.

2. 2 3/4 - (-1 1/2) + (-5/6) - (-3/8) - 4 2/3 - 19.6 - 4.6

   To work with mixed numbers, first convert them to improper fractions:

   11/4 - (-3/2) + (-5/6) - (-3/8) - 14/3 - 19.6 - 4.6

   Now, deal with the negative signs:

   11/4 + 3/2 + (-5/6) + 3/8 - 14/3 - 19.6 - 4.6

   Find a common denominator for fractions:

   22/8 + 12/8 - 20/8 + 6/8 - 112/8 - 19.6 - 4.6

   Now, add and subtract the fractions:

   (22 + 12 - 20 + 6 - 112)/8 - 19.6 - 4.6

   Calculate the numerator:

   (-92)/8 - 19.6 - 4.6

   Now, divide:

   -11.5 - 19.6 - 4.6

   Finally, add:

   -11.5 - 19.6 = -31.1 -31.1 - 4.6 = -35.7

   So, the answer is -35.7.

3. 19,6 - 4,6 - 6,6 - (-12,3)

   Start by dealing with the negative sign:

   19.6 - 4.6 - 6.6 + 12.3

   Now, add and subtract:

   (19.6 - 4.6 - 6.6) + 12.3

   Calculate the numbers inside the parentheses:

   8.4 + 12.3

   Add:

   8.4 + 12.3 = 20.7

   So, the answer is 20.7.

4. 2.8 - 5.3

   Simply subtract the numbers:

   2.8 - 5.3 = -2.5

   So, the answer is -2.5.