Question

3/4:(1-1/4+3/8) ((1/2+1/4-2/5):4/5 (1/3+1/4):(2-5/6)

Answer 1

Не думаю, что понятно, но я старалась)

Answer 2

To solve the expression, let's break it down step by step:

Step 1: Simplify the innermost parentheses first: 1/2 + 1/4 - 2/5 = 5/10 + 2/10 - 4/10 = (5 + 2 - 4)/10 = 3/10

2 - 5/6 = (12/6 - 5/6) = 7/6

Step 2: Simplify the next set of parentheses:

(1/3 + 1/4) = 4/12 + 3/12 = (4 + 3)/12 = 7/12

(3/4) : (1 - 1/4 + 3/8) = (3/4) : (7/8) = (3/4) * (8/7) = 24/28 = 6/7

Step 3: Now, we have the following expression left:

(6/7) * ((3/10) : (7/6))

Step 4: To divide by a fraction, invert the divisor and multiply:

(3/10) : (7/6) = (3/10) * (6/7) = 18/70 = 9/35

Step 5: Final step, now we just need to multiply the remaining fractions:

6/7 * 9/35 = (6 * 9) / (7 * 35) = 54 / 245

So the final result is 54/245.