Question

1)2,5-2 1/3*-5 1/7+1 1/3:(-5,6)= 2)-15, 87*2,09+(-15,87)*(-1,09)=

Answer 1

Ответ:

1)2.5-2 1/3=2 1/2-2 1/3=2 3/6-2 2/6=1/6

1/6*(-5 1/7)=1/6*(-36/7) =-6/7

1 1/3:(-5.6)=4/3*(-5/28) =-5/21

-6/7+(-5/21) =-18/21-5/21=-23/21=-1 2/21

2)2)-15, 87*2,09+(-15,87)*(-1,09)=−13,87

Пошаговое объяснение:

Answer 2

Let's break down each of these calculations step by step:

1. Calculate the expression: 2.5 - 2 1/3 * -5 1/7 + 1 1/3 / (-5.6)

First, we'll simplify the multiplication and division inside the parentheses:

• 2 1/3 = 2 + 1/3 = 7/3
• -5 1/7 = -5 - 1/7 = -36/7

Now, let's perform the multiplication and division:

= 2.5 - (7/3 * -36/7) + 1 1/3 / (-5.6)

Next, calculate the products:

= 2.5 + (7/3 * 36/7) + 1 1/3 / (-5.6)

Now, simplify the fractions in the products:

= 2.5 + (252/21) + 1 1/3 / (-5.6)

= 2.5 + (12) + 4/3 / (-5.6)

Now, add the fractions:

= 2.5 + 12 + (4/3) / (-5.6)

Now, calculate the division:

= 2.5 + 12 + (4/3) / (-5.6)

= 2.5 + 12 - (4/3) * (1/5.6)

Now, calculate the product in the last term:

= 2.5 + 12 - (4/16.8)

= 2.5 + 12 - 0.2381

Now, add and subtract:

= 14.2619 - 0.2381

= 14.0238

So, the result of the first expression is approximately 14.0238.

2. Calculate the expression: -15.87 * 2.09 + (-15.87) * (-1.09)

First, calculate the products:

= (-15.87 * 2.09) + (-15.87 * -1.09)

Now, calculate each product:

= -33.1163 + 17.3023

Now, add the two results:

= -33.1163 + 17.3023

= -15.814

So, the result of the second expression is approximately -15.814.