Question

СРОЧНО!!!20 - 18.5 : (6 4/15 - 4 3/20)

Answer 1

1) 6 11/15-4 3/20= 6 44/60-4 9/60=2 35/60=2 7/12

2) 18,6:2 7/12=18 3/5 : 31/12= 93/5 * 12/31= 7 1/5

3) 20-7 1/5= 20 - 7.2=12.8

Answer 2

6 -4-(4*4\60-3*3\60)=2-7\60=1 53\60

18 5\10:1 53\60=37\2*60\113=1110\113=9

20-9 93\113=10 20\113

Answer 3

Sure, let's solve the expression step by step:

1. First, let's simplify the expression inside the parentheses: (6 4/15 - 4 3/20)

2. Convert the mixed numbers into improper fractions: 6 4/15 = (6 * 15 + 4) / 15 = 94 / 15 4 3/20 = (4 * 20 + 3) / 20 = 83 / 20

3. Now, subtract the two fractions inside the parentheses: (94 / 15 - 83 / 20)

4. To subtract fractions, we need a common denominator. The least common multiple (LCM) of 15 and 20 is 60, so let's convert both fractions: (94 / 15) * (4 / 4) = 376 / 60 (83 / 20) * (3 / 3) = 249 / 60

5. Subtract the fractions: (376 / 60 - 249 / 60) = (376 - 249) / 60 = 127 / 60

6. Now, let's go back to the original expression and replace the parentheses with the result we just obtained: 20 - 18.5 : (127 / 60)

7. Next, let's divide 18.5 by (127 / 60): 18.5 ÷ (127 / 60) = 18.5 * (60 / 127) = 1110 / 127

8. Finally, subtract the result from step 7 from 20: 20 - (1110 / 127)

To get the final result, we can either leave it as a fraction or convert it to a decimal. Let's leave it as a fraction:

The final answer is: 20 - (1110 / 127) or (2290 / 127)