How do you evaluate $(- 0.8) + (- 7.2) - 5.4$ $(-0.8)+(-7.2)-5.4$ ?

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Answer 1 · 2018-03-06T13:54:08

Rules :- +- is equal to -
. . . . ++ is equal to +
. . . . -+ is equal to -
. . . . -- is equal to +
So - 0.8
. - 7.2
- 5.4 = -13.4

Answer 2 · 2018-03-06T14:06:01

$- 13.4$ $-13.4$

$(- 0.8) + (- 7.2) - 5.4$ $color(red)((-0.8)+(-7.2)-5.4)$

$\Rightarrow - 0.8 - 7.2 - 0.54$ $color(blue)(=>-0.8-7.2-0.54)$

$\Rightarrow - (0.8 + 7.2 + 5.4)$ $color(magenta)(=>-(0.8+7.2+5.4))$

$\Rightarrow - (8 + 5.4)$ $color(orange)(=>-(8+5.4))$

$\Rightarrow - (13.4)$ $color(brown)(=>-(13.4))$

$\Rightarrow - 13.4$ $color(green)(=>-13.4)$

How do you evaluate (−0.8)+(−7.2)−5.4(-0.8)+(-7.2)-5.4?