Question

Помогите плиз (1-3/4)*(4/5-34) б)14 *(1/2 + 1/3 + 1/4) в) 1/3 * 6/7 - 1/7 * 3/4

Answer 1

А)(1 - 3/4) * (4/5 - 34) = (1/4) * (4/5 - 34) = (1/4) * ( - 166/5) = ( - 83/10) = - 83/10 = - 8 3/10
б)14 * (1/2 + 1/3 + 1/4) = 14 * (13/12) = 91/6 =15 1/6
в)1/3 + 6/7 - 1/7 * 3/4 = 1/3 + 6/7 - 3/28 = 13/12 =1 1/12

Answer 2

a) (1-3/4)*(4/5-34) First, let's simplify the expressions inside the parentheses: 1-3/4 = 4/4 - 3/4 = 1/4 4/5 - 34 = 4/5 - 34/1 = 4/5 - 170/5 = -166/5

Now, let's multiply the simplified expressions: (1/4) * (-166/5) = -166/20 = -83/10

So, the answer to the expression (1-3/4)*(4/5-34) is -83/10.

b) 14*(1/2 + 1/3 + 1/4) First, let's add the fractions inside the parentheses: 1/2 + 1/3 + 1/4 = 6/12 + 4/12 + 3/12 = 13/12

Now, let's multiply 14 by 13/12: 14 * 13/12 = 182/12 = 15 1/6

So, the answer to the expression 14*(1/2 + 1/3 + 1/4) is 15 1/6.

c) 1/3 * 6/7 - 1/7 * 3/4 First, let's multiply the fractions: 1/3 * 6/7 = 6/21 = 2/7 1/7 * 3/4 = 3/28

Now, let's subtract the two results: 2/7 - 3/28 = 8/28 - 3/28 = 5/28

So, the answer to the expression 1/3 * 6/7 - 1/7 * 3/4 is 5/28.