Question

Помогите 1) 1/16 +(-1/8)-3/4= 2) -1/3 * (-4/5) *3/12= 3) -1 1/2 *(- 3/7+1/2)=

Answer 1

1/16+(-1/8)-3/4=9/16
-1/3*(-4/5)*3/12=1/15
-11/2*(-3/7+1/2)=143/28

Answer 2

1. To add and subtract fractions, you need to find a common denominator. In this case, the common denominator for 16, 8, and 4 is 16. So we need to convert each fraction to have a denominator of 16:

1/16 + (-1/8) - 3/4 = (1/16) + (-2/16) - (12/16) = -13/16

Therefore, 1/16 + (-1/8) - 3/4 = -13/16.

2. To multiply fractions, you simply multiply the numerators together and multiply the denominators together. Then you can simplify if possible:

(-1/3) * (-4/5) * (3/12) = (1/3) * (4/5) * (1/4) = (1/3) * (1/5) = 1/15

Therefore, -1/3 * (-4/5) * 3/12 = 1/15.

3. To multiply a mixed number by a fraction, you first need to convert the mixed number to an improper fraction. To do this, you multiply the whole number by the denominator and then add the numerator. So:

-1 1/2 = -3/2

Then, we can distribute the multiplication and simplify:

-1 1/2 * (-3/7 + 1/2) = (-3/2) * (-3/7) + (-3/2) * (1/2) = 9/14 - 3/4 = 3/28

Therefore, -1 1/2 * (-3/7 + 1/2) = 3/28.