Question

Выполните действия пж подробно =3 а) (-2.5+2 1/3)*(-5 1/7)+1 1/3:(-5.6)

Answer 1

1)-2,5+2 1/3=-5/2+7/3=-15/6+14/6=-1/6
2)-1/6*(-5 1/7)=-1/6*(-36/7)=6/7
3)1 1/3:(-5,6)=4/3:(-28/5)=4/3*(-5/28)=-5/21
4)6/7+(-5/21)=18/21-5/21=13/21

Answer 2

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

Step 1: Simplify the expression within the parentheses. (-2.5 + 2 + 1/3) = -0.5 + 1/3 To add these fractions, we need a common denominator, which is 3. (-0.5 + 1/3) = (-3/6) + (2/6) = -1/6

So, the expression becomes: -1/6 * (-5 + 1/7) + 1 + 1/3 : (-5.6)

Step 2: Simplify the expression within the second set of parentheses. (-5 + 1/7) = (-35/7 + 1/7) = -34/7

The expression becomes: -1/6 * (-34/7) + 1 + 1/3 : (-5.6)

Step 3: Perform the multiplication and division from left to right. -1/6 * (-34/7) = (1/6) * (34/7) = 34/42 = 17/21

The expression becomes: 17/21 + 1 + 1/3 : (-5.6)

Step 4: Perform the addition and division from left to right. 17/21 + 1 = (17/21) + (21/21) = 38/21

The expression becomes: 38/21 + 1/3 : (-5.6)

Step 5: Perform the division. 1/3 : (-5.6) = (1/3) * (-1/5.6) = -1/16.8 = -1/16.8

The expression becomes: 38/21 - 1/16.8

Step 6: Convert the fractions to a common denominator and subtract. 38/21 - 1/16.8 = (38/21) * (16.8/16.8) - (1/16.8) = 638.4/352.8 - 1/16.8 To subtract these fractions, we need a common denominator, which is 352.8. 638.4/352.8 - 1/16.8 = (638.4 - 21)/352.8 = 617.4/352.8

Finally, the value of the expression is 617.4/352.8.