Question

1 5/7-3/4 дроби 14/15*18/35 дроби

Answer 1

1 5/7-3/4=27/28 14/15*18/35=12/25

Answer 2

1.35 и 0.4 как-то так 

Answer 3

Let's solve this expression step by step:

1. 5/7 - 3/4

To subtract fractions with different denominators, we need to find a common denominator. The least common multiple of 7 and 4 is 28, so we can rewrite the fractions with denominators of 28:

5/7 = 20/28 3/4 = 21/28

Now we can subtract them:

20/28 - 21/28 = -1/28

So the first part of the expression simplifies to -1/28.

2. 14/15 * 18/35

To multiply fractions, we simply multiply their numerators and denominators:

14/15 * 18/35 = (1418)/(1535) = 252/525

We can simplify this fraction by dividing both numerator and denominator by their greatest common divisor, which is 21:

252/525 = (252/21) / (525/21) = 12/25

So the second part of the expression simplifies to 12/25.

Putting it all together:

-1/28 + 12/25 = (-25/28)(1/25) + (28/28)(12/25) = (-25/28)(-1/25) + 12/28 = 1/28 + 3/7 = (17+3)/28 = 10/28 = 5/14

Therefore, the final answer is 5/14.