Question

-1 1/7 ÷ 2 2/7= (-3,9 × 2,8 + 26,6):(-3,2)-2,1=

Answer 1

Ответ:

(-3,9*2,8+26,6):(-3,2)-2,1=-7

1)-3,9*2,8=-10,2

2)-10,2+26,6=15,68

3)15,68):(-3,2)=-4,9

4)-4,9-2,1=-7

Пошаговое объяснение:

Answer 2

-1 1/7 : 2 2/7 = - 8*7/16*7= - 1/2

(-3,9 * 2,8 + 26,6):(-3,2)-2,1= (- 10,92 + 26,6):(-3,2)-2,1= 15,68:(-3,2)-2,1= -4,9-2,1= -7

Answer 3

Let's break down the calculations step by step:

1. -1 1/7 ÷ 2 2/7: First, we need to convert the mixed fractions into improper fractions: -1 1/7 = -8/7 2 2/7 = 16/7

   Now, divide the fractions: (-8/7) ÷ (16/7) = -8/7 * 7/16 = -1/2

2. (-3.9 × 2.8 + 26.6):(-3.2) - 2.1: Perform the calculations within each set of parentheses first: -3.9 × 2.8 = -10.92 (approximately, rounded to two decimal places) -3.2 26.6 -10.92 / -3.2 ≈ 3.4125 (approximately, rounded to four decimal places)

   Now, continue with the rest of the expression: 3.4125 - 2.1 = 1.3125 (approximately, rounded to four decimal places)

3. Final Result: Now, substitute the result from step 1 into the result from step 2: 1.3125 * -1/2 = -0.65625 (approximately, rounded to five decimal places)

So, the final result is approximately -0.65625.