Question

Б)1/5+3/10+7/20 В)3/20+7/30+2/40 Г)17/20+23/30+11/60

Answer 1

б 17/20

в 13/30

г 9/5 это все

Answer 2

Ответ на картинке внизу страницы

Answer 3

To solve these expressions, you need to find the least common denominator (LCD) and then add the fractions together. Let's tackle each expression step by step:

Б) 1/5 + 3/10 + 7/20

Step 1: Find the least common denominator (LCD) The least common denominator of 5, 10, and 20 is 20.

Step 2: Convert each fraction to have a denominator of 20 1/5 = 4/20 3/10 = 6/20 7/20 = 7/20 (already in the right form)

Step 3: Add the fractions 4/20 + 6/20 + 7/20 = 17/20

So, the result of expression Б is 17/20.

В) 3/20 + 7/30 + 2/40

Step 1: Find the least common denominator (LCD) The least common denominator of 20, 30, and 40 is 120.

Step 2: Convert each fraction to have a denominator of 120 3/20 = 18/120 7/30 = 28/120 2/40 = 3/120

Step 3: Add the fractions 18/120 + 28/120 + 3/120 = 49/120

So, the result of expression В is 49/120.

Г) 17/20 + 23/30 + 11/60

Step 1: Find the least common denominator (LCD) The least common denominator of 20, 30, and 60 is 60.

Step 2: Convert each fraction to have a denominator of 60 17/20 = 51/60 23/30 = 46/60 11/60 = 11/60 (already in the right form)

Step 3: Add the fractions 51/60 + 46/60 + 11/60 = 108/60

Now, we need to simplify the fraction. The greatest common divisor (GCD) of 108 and 60 is 12.

108/60 = (108 ÷ 12) / (60 ÷ 12) = 9/5

So, the result of expression Г is 9/5 or 1 and 4/5.

Final answers: Б) 1/5 + 3/10 + 7/20 = 17/20 В) 3/20 + 7/30 + 2/40 = 49/120 Г) 17/20 + 23/30 + 11/60 = 9/5 (or 1 and 4/5)