Question

А) 3/20+3/4+5/12= Б)4/5 +17/15+11/15=

Answer 1

Пошаговое объяснение: нужно свести все числа к общему знаменателю, только потом можно добавлять числители. В конце по возможности сократить

Answer 2

Ответ:

А)$\frac{79}{60}$ или 1$\frac{19}{60}$

Б)$\frac{48}{15}$ или 3 $\frac{3}{15}$

Пошаговое объяснение:

А) $\frac{3}{20}+\frac{3}{4}+\frac{5}{12}$=$\frac{3}{20} +\frac{15}{20} +\frac{5}{12}$= $\frac{18}{20} +\frac{5}{12}$=$\frac{54}{60} +\frac{25}{60} =\frac {79}{60}$ дроби нужно умножить, т.к. их можно складывать только с общим знаменателем

Б) $\frac{4}{5} + \frac{17}{15} +\frac{11}{15} = \frac{12}{15} +\frac{17}{15}+ \frac{11}{15}= \frac{40}{15}$=3 $\frac{3}{15}$

Answer 3

Let's solve the expressions step by step:

A) 3/20 + 3/4 + 5/12

To add fractions, we need to have a common denominator. In this case, the common denominator is 20. So, we'll convert all the fractions to have a denominator of 20:

3/20 + 15/20 + 5/20

Now, we can add the numerators:

(3 + 15 + 5)/20 = 23/20

However, 23/20 can be simplified further:

23/20 = 1 + 3/20

So the final result is:

A) 3/20 + 3/4 + 5/12 = 1 + 3/20

B) 4/5 + 17/15 + 11/15

To add fractions, we need a common denominator again. The least common multiple (LCM) of 5 and 15 is 15, so we'll convert all fractions to have a denominator of 15:

12/15 + 17/15 + 11/15

Now, we can add the numerators:

(12 + 17 + 11)/15 = 40/15

40/15 can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 5:

(40 ÷ 5) / (15 ÷ 5) = 8/3

So the final result is:

B) 4/5 + 17/15 + 11/15 = 8/3