Question

-8,7-2,3+5,9-4,9= (6,5-7,4)+(1,3-6,5-9,1)= -(67,45-6,58+2,98)-67,45=

Answer 1

=-11+1=10
=-0,9+(-14,3)=-15,2
=-(60,87+2,98)-67,45=-63,8-67,45=3,65

Answer 2

Let's break down the calculations step by step:

1. -8 + 7 - 2 + 3 + 5 - 9 - 4 + 9 = ?

We group the positive and negative numbers:

= (-8 + 7 - 2 + 3 + 5) + (-9 - 4 + 9)

Now, calculate the sums inside the parentheses:

= (5 + 3 + 5) + (-4)

= 13 - 4

= 9

2. (6.5 - 7.4) + (1.3 - 6.5 - 9.1) = ?

Calculate the sums inside the parentheses:

= (-0.9) + (-14.3)

Now, add the two numbers:

= -0.9 - 14.3

= -15.2

3. -(67.45 - 6.58 + 2.98) - 67.45 = ?

Calculate the sum inside the parentheses:

= -(67.45 - 9.56)

= -(57.89)

Now, subtract the remaining number:

= -57.89 - 67.45

= -125.34

So, the final result is:

-125.34