Question

Вычеслить 1) -15- -20- - 3×-5=. 2) -32+-32:-8--4=

Answer 1

1) To calculate the expression -15 - (-20) - 3 × -5, we follow the order of operations, which is commonly known as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction):

Step 1: Simplify the multiplication: 3 × -5 = -15

Step 2: Solve the subtraction inside the parentheses: -15 - (-20) = -15 + 20 = 5

Step 3: Combine the subtraction and multiplication results: 5 - 15 = -10

Therefore, the result of the expression -15 - (-20) - 3 × -5 is -10.

2) Moving on to the expression -32 - 32 : -8 - -4:

Step 1: Simplify the division: 32 : -8 = -4

Step 2: Solve the subtraction inside the parentheses: -32 - -4 = -32 + 4 = -28

Therefore, the result of the expression -32 - 32 : -8 - -4 is -28.

So, the answers to the given expressions are:

1) -10 2) -28