Question

30+20:(-5)= 3,9*4,58+3,9*5,42=

Answer 1

30+(-4)=26

17,862+21,138=39

Answer 2

Let's solve the given expressions step-by-step:

1. 30 + 20 : (-5) To evaluate this expression, we need to perform the operations in the correct order, following the order of operations (PEMDAS/BODMAS):

P - Parentheses E - Exponents MD - Multiplication and Division (from left to right) AS - Addition and Subtraction (from left to right)

First, we'll handle the division: 30 + 20 / (-5)

Now, perform the division: 30 + (-4)

Finally, add the numbers: 30 - 4 = 26

So, the result of the first expression is 26.

2. 3.9 * 4.58 + 3.9 * 5.42 Simply multiply the numbers and then add the products: (3.9 * 4.58) + (3.9 * 5.42)

Calculate the products: 17.862 + 21.138

Now, add the products: 17.862 + 21.138 = 39

So, the result of the second expression is 39.

To summarize:

1. 30 + 20 : (-5) = 26
2. 3.9 * 4.58 + 3.9 * 5.42 = 39