Question

-2×(-5)+20:(-2)-10×(-1)-9 -6.15×(-1.02)+7.8:(-026)

Answer 1

Решение на фотографии

Answer 2

$- 2 \times ( - 5) + 20 \div ( - 2) - 10 \times ( - 1) - \\ - 9 - 6.15 \times ( - 1.02) + 7.8 \div ( - 0,26) = \\ = 10 - 10 + 10 - 9 + 6.273 - 30 = \\ = 7.273 - 30 = \\ = - 22.727 \:$

Answer 3

To solve the given expression, follow the order of operations (PEMDAS/BODMAS):

1. Parentheses/Brackets
2. Exponents/Orders
3. Multiplication and Division (from left to right)
4. Addition and Subtraction (from left to right)

Let's break down the expression step by step:

Step 1: Parentheses/Brackets There are no parentheses or brackets in the given expression, so we move on to the next step.

Step 2: Exponents/Orders There are no exponents in the given expression, so we move on to the next step.

Step 3: Multiplication and Division (from left to right) -2 × (-5) = 10 20 ÷ (-2) = -10 -10 × (-1) = 10

Step 4: Addition and Subtraction (from left to right) 10 + 10 = 20 -6.15 × (-1.02) = 6.273 7.8 ÷ (-0.26) = -30

Finally, we have: 20 + 6.273 - 30

Step 5: Final Calculation 20 + 6.273 - 30 = -3.727

So, the final result of the given expression is approximately -3.727.