Question

9/15:(3-5/7:1 4/21 (там где / это дробь)

Answer 1

Ответ:

Пошаговое объяснение:

5/7:1 4/21=5/7*21/25=3/5

3-3/5=2 2/5

9/15:2 2/5=9/15*5/12=1/4

Answer 2

To evaluate the expression 9/15:(3-5/7:1 4/21), let's break it down step by step:

Step 1: Simplify the expression inside the parentheses: 3 - 5/7 = (21/7 - 5/7) = 16/7

Step 2: Simplify the expression with colons from left to right: 9/15:(16/7:1 4/21)

Step 3: Evaluate the expression within the parentheses: 16/7:1 4/21 = (16/7) / 1 * (4/21) = (16/7) * (4/21) = 64/147

Step 4: Substitute the simplified expression back into the original expression: 9/15: (64/147)

Step 5: Simplify the division by multiplying with the reciprocal: 9/15 * (147/64)

Step 6: Simplify the multiplication: (9 * 147) / (15 * 64)

Step 7: Evaluate the multiplication: 1323 / 960

The final result is approximately 1.378125.