Question

1) (6- 4 8/15):2,2. 2) (5,4- 2 1/3): 7 2/3 3) (7,6- 4 3/4):1,9

Answer 1

Пошаговое объяснение:

вот держи Все расписала по действиям

Answer 2

To solve these arithmetic expressions, let's break them down step by step:

1. (6 - 4 8/15) ÷ 2,2:

First, convert the mixed number 4 8/15 into an improper fraction: 4 8/15 = (4 * 15 + 8) / 15 = 68/15

Now, we can subtract: 6 - 68/15 = (6 * 15/15) - 68/15 = 90/15 - 68/15 = 22/15

Finally, divide by 2,2: 22/15 ÷ 2,2 = (22/15) ÷ (2 + 2/10) = (22/15) ÷ (2 + 1/5) To simplify the division, we'll convert the mixed number 2 1/5 into an improper fraction: 2 1/5 = (2 * 5 + 1) / 5 = 11/5

Now, we can divide: (22/15) ÷ (11/5) = (22/15) * (5/11) = (22 * 5) / (15 * 11) = 110/165 = 2/3

Therefore, the result of (6 - 4 8/15) ÷ 2,2 is 2/3.

2. (5,4 - 2 1/3) ÷ 7 2/3:

Convert the mixed numbers into improper fractions: 5,4 = 5 + 4/10 = 5 + 2/5 = (5 * 5 + 2) / 5 = 27/5 2 1/3 = (2 * 3 + 1) / 3 = 7/3 7 2/3 = (7 * 3 + 2) / 3 = 23/3

Now, subtract: 27/5 - 7/3 = (27 * 3) / (5 * 3) - (7 * 5) / (3 * 5) = 81/15 - 35/15 = 46/15

Finally, divide by 7 2/3: 46/15 ÷ 23/3 = (46/15) * (3/23) = (46 * 3) / (15 * 23) = 138/345 = 2/5

Therefore, the result of (5,4 - 2 1/3) ÷ 7 2/3 is 2/5.

3. (7,6 - 4 3/4) ÷ 1,9:

Convert the mixed numbers into improper fractions: 7,6 = 7 + 6/10 = 7 + 3/5 = (7 * 5 + 3) / 5 = 38/5 4 3/4 = (4 * 4 + 3) / 4 = 19/4 1,9 = 1 + 9/10 = 1 + 9/10 = (1 * 10 + 9) / 10 = 19/10

Now, subtract: 38/5 - 19/4 = (38 * 4) / (5 * 4) - (19 * 5) / (4 * 5) = 152/20 - 95/20 = 57/20

Finally, divide by 1,9: 57/20 ÷ 19/10 = (57/20) * (10/19) = (57 * 10) / (20 * 19) = 570/380 = 3/2

Therefore, the result of (7,6 - 4 3/4) ÷ 1,9 is 3/2.