Question

Выполните действие 67/75 - 38/75 = а)28/75 б)29/75 в)27/75 #2 2/3 - 1/4 = а)6/12 б)2/12 в)5/12 #3 1/3+2/5 = а)12/8 б)11/10 в)11/15 #4 Сократите дробь 18/45= а)9/15 б)2/5 в)9/5

Answer 1

Ответ:

Пошаговое объяснение:

Answer 2

#1 To subtract fractions, they must have the same denominator. In this case, both fractions have a denominator of 75. So, we can proceed with the subtraction:

(67/75) - (38/75) = (67 - 38) / 75 = 29/75

Therefore, the answer is б) 29/75.

#2 To subtract mixed fractions, convert them to improper fractions first and then find a common denominator.

2/3 = 2 * (1/3) = 6/3 1/4 = 1 * (1/4) = 4/4

Now, the common denominator is 12:

(6/12) - (3/12) = (6 - 3) / 12 = 3/12 = 1/4

Therefore, the answer is б) 2/12.

#3 To add fractions, they must have the same denominator. The common denominator here is 15:

1/3 = 5/15 (multiply numerator and denominator by 5) 2/5 = 6/15 (multiply numerator and denominator by 3)

Now, we can add:

(5/15) + (6/15) = (5 + 6) / 15 = 11/15

Therefore, the answer is в) 11/15.

#4 To simplify a fraction, find the greatest common divisor (GCD) of the numerator and denominator, and then divide both by the GCD.

GCD(18, 45) = 9

Now, divide both the numerator and denominator by 9:

18/45 = (18 ÷ 9) / (45 ÷ 9) = 2/5

Therefore, the answer is б) 2/5.