Question

(-12/5-3/4):2,3/1+5,3/1*0,75

Answer 1

Ответ:

2.6

...................

Answer 2

Let's solve the expressions step by step:

1. (-12/5 - 3/4) ÷ 2:

To perform this calculation, first find the common denominator for -12/5 and -3/4, which is 20.

(-12/5) * (4/4) = -48/20 (-3/4) * (5/5) = -15/20

Now, the expression becomes: (-48/20 - 15/20) ÷ 2

Combine the fractions: (-48/20 - 15/20) = (-63/20)

Now divide by 2: (-63/20) ÷ 2

To divide fractions, multiply the first fraction by the reciprocal of the second fraction:

(-63/20) ÷ 2 = (-63/20) * (1/2) = -63/40

So, the result is -63/40.

2. (3/1 + 5/3) * 0.75:

First, add 3/1 and 5/3:

Common denominator for 3/1 and 5/3 is 3.

(3/1) * (3/3) = 9/3 (5/3)

Now, the expression becomes: (9/3 + 5/3) * 0.75

Combine the fractions: (9/3 + 5/3) = (14/3)

Now multiply by 0.75: (14/3) * 0.75

To multiply a fraction by a number, simply multiply the numerator by the number:

(14/3) * 0.75 = 14/3 * 3/4 = 14/4 = 7/2

So, the result is 7/2.

In summary:

1. (-12/5 - 3/4) ÷ 2 = -63/40
2. (3/1 + 5/3) * 0.75 = 7/2