Question

(3 2/3 - 1 2/7 * 5 4/9) : /-2,5/

Answer 1

Ответ:

1 1/3

Объяснение:

(3 2/3-1 2/7*5 4/9):(-2,5)=4/3=1 1/3

1) 1 2/7*5 4/9=9/7*49/9=7

2) 3 2/3-7 =3 2/3-6 3/3= -3 1/3

3) -3 1/3:(- 2,5)= -10/3:(-25/10)=-10/3*(-10/25)=100/75 =4/3=1 1/3

Вроде-бы так...

Answer 2

To simplify the given expression, let's break it down into steps:

Step 1: Evaluate the multiplication part 1 2/7 * 5 4/9 To multiply mixed fractions, convert them into improper fractions first: 1 2/7 = (7 * 1 + 2) / 7 = 9/7 5 4/9 = (9 * 5 + 4) / 9 = 49/9

Now, multiply the fractions: (9/7) * (49/9) To multiply fractions, multiply the numerators and denominators separately: (9 * 49) / (7 * 9) = 441/63 = 7

Step 2: Evaluate the division part (3 2/3 - 7) / -2.5 To subtract mixed fractions, convert them into improper fractions first: 3 2/3 = (3 * 3 + 2) / 3 = 11/3

Now, divide the fraction by -2.5: (11/3) / -2.5 To divide fractions, multiply the first fraction by the reciprocal of the second fraction: (11/3) * (-1/2.5) = (11/3) * (-2/5) To multiply fractions, multiply the numerators and denominators separately: (11 * -2) / (3 * 5) = -22/15

Step 3: Evaluate the final expression Now, let's substitute the values from Step 1 and Step 2 into the original expression: (3 2/3 - 1 2/7 * 5 4/9) / -2.5 = (11/3 - 7) / -2.5 = (-22/15) / -2.5 To divide fractions, multiply the first fraction by the reciprocal of the second fraction: = (-22/15) * (-1/2.5) To multiply fractions, multiply the numerators and denominators separately: = (22/15) * (2/2.5) = (22 * 2) / (15 * 2.5) = 44/30 = 22/15

Therefore, the simplified value of the expression (3 2/3 - 1 2/7 * 5 4/9) / -2.5 is 22/15.