Question

2/7*(1,4-7/2)-1,2 (5/6-0,5

Answer 1

1,4-7/2=1,4-3,5=-2,1
2/7*(-2,1)=2/7*(-21/10)=-3/5=-0,6
5/6-0,5=5/6-1/2=5/6-3/6=2/6=1/3
1,2*1/3=6/5*1/3=2/5=0,4
-0,6-0,4=-1

Answer 2

1) 2/7 * 1,4=2*0,2=0,4

2) 2/7 * 7/2 = 1

3) 1,2 * 5/6 = 0,2*5=1

4)1,2*0,5 = 0,6

5) 0,4-1-1+0,6 = -1

Answer 3

Let's break down the expression step by step:

2/7*(1,4-7/2)-1,2 (5/6-0,5)

First, we need to simplify the expression inside the parentheses:

1,4 - 7/2

To do this, we can convert 1.4 to a fraction:

1.4 = 14/10 = 7/5

Now we can rewrite the expression as:

7/5 - 7/2

To combine these fractions, we need a common denominator, which is 10:

7/5 * 2/2 = 14/10 7/2 * 5/5 = 35/10

So the expression simplifies to:

14/10 - 35/10 = -21/10

Now we can substitute this back into the original expression:

2/7*(-21/10) - 1.2(5/6 - 0.5)

Next, we can simplify the second set of parentheses:

5/6 - 0.5

To do this, we can convert 0.5 to a fraction:

0.5 = 1/2

Now we can rewrite the expression as:

5/6 - 1/2

To combine these fractions, we need a common denominator, which is 6:

5/6 * 2/2 = 10/12 1/2 * 3/3 = 3/6

So the expression simplifies to:

10/12 - 3/6 = 4/12 = 1/3

Now we can substitute this back into the original expression:

2/7*(-21/10) - 1.2(1/3)

Next, we can simplify the multiplication by 2/7:

2/7*(-21/10) = -6/35

Now we can substitute this back into the expression:

-6/35 - 1.2(1/3)

Finally, we can simplify the multiplication by 1.2 and subtract from -6/35:

-6/35 - 1.2(1/3) = -6/35 - 4/15 = (-18 - 28)/105 = -46/105

So the final answer is:

-46/105