Question

1 Вычисчлите a)4\7+2\5 b)7\12-5\9 в) 14\18*6\7 г)9\17/27\34

Answer 1

Ответ:

4 я не понял а так должно быть правилтно

Answer 2

Ответ:

відповідь скільки може бути все

Answer 3

a) 4/7 + 2/5: To add fractions, you need a common denominator. The least common denominator for 7 and 5 is 35.

(4/7) * (5/5) = 20/35 (2/5) * (7/7) = 14/35

Now, you can add the fractions:

(20/35) + (14/35) = 34/35

So, a) 4/7 + 2/5 = 34/35.

b) 7/12 - 5/9: To subtract fractions, you also need a common denominator. The least common denominator for 12 and 9 is 36.

(7/12) * (3/3) = 21/36 (5/9) * (4/4) = 20/36

Now, you can subtract the fractions:

(21/36) - (20/36) = 1/36

So, b) 7/12 - 5/9 = 1/36.

c) 14/18 * 6/7: To multiply fractions, simply multiply the numerators together and the denominators together.

(14/18) * (6/7) = (14 * 6) / (18 * 7) = 84/126

You can simplify this fraction by finding the greatest common divisor (GCD) of 84 and 126, which is 42. Divide both the numerator and denominator by 42:

(84/42) / (126/42) = 2/3

So, c) 14/18 * 6/7 = 2/3.

d) 9/17 / 27/34: To divide fractions, you can multiply the first fraction by the reciprocal of the second fraction (i.e., flip the second fraction and multiply).

(9/17) / (27/34) = (9/17) * (34/27)

Now, you can simplify the fraction by finding the greatest common divisor (GCD) of 9 and 27, which is 9. Divide both the numerator and denominator of the first fraction by 9:

(9/9) * (34/27) = 1 * (34/27) = 34/27

So, d) 9/17 / 27/34 = 34/27.