Question

958. 3) -48 · 54:48 + 54 · 48 : (-54); 4) 72 · 38: (-72) - 38 · 72:(-38). »пожалуйста, с объяснением ​

Answer 1

Ответ:

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Answer 2

3) -48 + 54 ÷ 48 + 54 ÷ 48 ÷ (-54) To solve this expression, we need to follow the order of operations (PEMDAS - Parentheses, Exponents, Multiplication and Division, Addition and Subtraction) and then work from left to right.

First, we perform the division: 54 ÷ 48 = 1.125 So the expression becomes: -48 + 1.125 + 1.125 ÷ (-54)

Next, we perform the addition and subtraction from left to right: -48 + 1.125 = -46.875 -46.875 + 1.125 = -45.75 -45.75 ÷ (-54) = 0.8472

Therefore, the value of the expression is 0.8472.

4) 72 ÷ 38 ÷ (-72) + 38 ÷ 72 ÷ (-38) Similar to the previous expression, we need to follow the order of operations and then work from left to right.

First, we perform the division: 72 ÷ 38 = 1.8947 and 38 ÷ 72 = 0.5278 So the expression becomes: 1.8947 ÷ (-72) + 0.5278 ÷ (-38)

Next, we perform the division: 1.8947 ÷ (-72) = -0.0263 0.5278 ÷ (-38) = -0.0139

Therefore, the value of the expression is -0.0263 + (-0.0139) = -0.0402.