Question

-2×(5×-0,8-3×0,8)-4×(2×-0,8+7×0,1)​

Answer 1

-2×(5×-0,8-3×0,8)-4×(2×-0,8+7×0,1)=-2(-4-2,4)-4(-1,6+0,7)=(-2)×(-6,4)-4×(-0,9)=12,8+3,6=16,4.

Answer 2

Let's simplify the given expression step by step:

-2×(5×(-0.8) - 3×0.8) - 4×(2×(-0.8) + 7×0.1)

First, let's evaluate the expressions inside the parentheses:

-2×(5×(-0.8) - 3×0.8) = -2×(-4 - 2.4)

Now, let's solve the expression inside the first set of parentheses:

-2×(-4 - 2.4) = -2×(-6.4)

Now, we simplify the second set of parentheses:

-4×(2×(-0.8) + 7×0.1) = -4×(-1.6 + 0.7)

Now, let's solve the expression inside the second set of parentheses:

-4×(-1.6 + 0.7) = -4×(-0.9)

Now, we have both simplified expressions:

-2×(-6.4) and -4×(-0.9)

Finally, let's calculate the remaining multiplication:

-2×(-6.4) = 12.8

-4×(-0.9) = 3.6

Now, we subtract the two results:

12.8 - 3.6 = 9.2

So, the final simplified result of the expression is 9.2.