Question

-5,7/(-19)-0,8*(-4)+2,7/0,3

Answer 1

Пишу сразу решение:
0,3+3,2+9=12,5
Ответ: 12,5

Answer 2

1)0,8*-4=-3,2
2)-5,7/-19=0,3
3)2,7/0,3=9
4)0,3-(-3,2)=3,5
5)3,5+9=12,5

Answer 3

To solve the expression, let's break it down step by step:

First, let's simplify the expression within the parentheses:

-5 + 7/(-19) - 0.8 * (-4) + 2.7 / 0.3

Next, let's perform the operations in the order of operations (PEMDAS/BODMAS):

-5 + (7/(-19)) - (0.8 * (-4)) + (2.7 / 0.3)

Now, let's simplify the multiplications and divisions:

-5 + (-7/19) + (3.2) + (9)

Next, let's simplify the addition and subtraction:

-5 - (7/19) + 3.2 + 9

To add and subtract fractions, we need a common denominator. In this case, the common denominator is 19. Let's rewrite the expression with a common denominator:

(-5 * 19)/19 - (7/19) + (3.2 * 19)/19 + (9 * 19)/19

Simplifying further:

(-95/19) - (7/19) + (60.8/19) + (171/19)

Now, let's add and subtract the fractions:

(-95 - 7 + 60.8 + 171)/19

Simplifying further:

(129.8)/19

Finally, dividing 129.8 by 19:

6.83684210526

Therefore, the simplified value of the expression -5 + 7/(-19) - 0.8 * (-4) + 2.7 / 0.3 is approximately 6.8368.