Question

-0,8+(-1 1/5) +1 1/4

Answer 1

$\displaystyle \tt -0,8+(-1\frac{1}{5})+1\frac{1}{4}=-\frac{8}{10}-\frac{6}{5}+\frac{5}{4}=-\frac{16}{20}-\frac{24}{20}+\frac{25}{20}=-\frac{40}{20}+\frac{25}{20}=-\frac{15}{20}=-\frac{3}{4}=-0,75$

Answer 2

To calculate the sum of the given numbers, you need to perform the addition:

-0.8 + (-1 1/5) + 1 1/4

First, let's convert the mixed numbers into improper fractions: -1 1/5 = -(1 + 1/5) = -6/5 1 1/4 = 1 + 1/4 = 5/4

Now, we can add the numbers:

-0.8 + (-6/5) + 5/4

To add these fractions, we need to find a common denominator. The common denominator for 5 and 4 is 20.

-0.8 = -8/10 -6/5 = -12/10 5/4 = 25/20

Now, add the fractions together:

-8/10 + (-12/10) + 25/20

Combine the numerators:

= (-8 - 12 + 25) / 20 = 5/20

Simplify the fraction:

= 1/4

So, the final sum is 1/4.