Question

(-6/7)*(-2/3) и 7/8:(-5/6)

Answer 1

Получается так

4/7 и -1.05

Answer 2

To simplify the expressions, let's perform the calculations step by step:

1. (-6/7) * (-2/3):

To multiply two fractions, simply multiply their numerators together and their denominators together.

(-6/7) * (-2/3) = (6 * 2) / (7 * 3) = 12 / 21

Now, let's simplify the fraction:

12 / 21 can be reduced by dividing both the numerator and denominator by their greatest common divisor (GCD), which is 3.

12 ÷ 3 = 4 21 ÷ 3 = 7

So, (-6/7) * (-2/3) simplifies to 4/7.

2. 7/8 ÷ (-5/6):

To divide by a fraction, we can multiply by its reciprocal. The reciprocal of a fraction a/b is b/a.

So, 7/8 ÷ (-5/6) is the same as 7/8 * (-6/5):

Now, perform the multiplication:

(7 * (-6)) / (8 * 5) = (-42) / 40

Now, simplify the fraction:

(-42) / 40 can be reduced by dividing both the numerator and denominator by their GCD, which is 2.

(-42) ÷ 2 = -21 40 ÷ 2 = 20

So, 7/8 ÷ (-5/6) simplifies to -21/20.

To summarize: (-6/7) * (-2/3) simplifies to 4/7, and 7/8 ÷ (-5/6) simplifies to -21/20.