Question

( 2, 7 - 1 / 5 ) ÷ ( 1 / 2 + 4,5 )

Answer 1

(2,7-0,2):(0,5+4,5)=2,5:5=0,5

Answer 2

(2,7 - 1/5)÷(1/2+4,5)= 1) 2,7-1/5= 2 7/10 - 1/5 ( чтобы найти общий множитель умножать число 1/5 на 2)= 2 7/10 - 2/10 = 2 5/10  2) 1/2+4,5= 1/2 + 4 5/10 ( умножаю число 1/2 на 5)= 5/10 +4 5/10= 4 10/10= 5 3) 2 5/10÷5= 25/10 × 1/5 = 25/50= 5/10=1/2=0,5 Ответ : 0,5  

Answer 3

Let's solve the expression step by step:

Step 1: Perform the calculations within the parentheses first. (2, 7 - 1 / 5) = 2, 7 - 0.2 (since 1 / 5 = 0.2) = 2, 6.8 = 6.8

Step 2: Now, deal with the second set of parentheses. (1 / 2 + 4.5) = 0.5 + 4.5 = 5

Step 3: Divide the result from Step 1 by the result from Step 2. 6.8 ÷ 5 = 1.36

So, the final result of the expression is 1.36.