Question

4+5•7-2 как получить ответ 45 и расставить скобки

Answer 1

Сложение 4 и 5, вычитание 2 из 7, все это перемножаем между собой

(4+5)х(7-2) = 45

Answer 2

To obtain the result of 45 for the expression 4 + 5 * 7 - 2 and add parentheses to get that result, follow these steps:

1. Observe the expression: 4 + 5 * 7 - 2

2. Use the order of operations (PEMDAS/BODMAS) to evaluate the expression with parentheses:

   P: Parentheses (simplify expressions within parentheses first) E: Exponents (evaluate any exponents) MD: Multiplication and Division (perform these operations from left to right) AS: Addition and Subtraction (perform these operations from left to right)

To get the result of 45, add parentheses as follows:

Step 1: 4 + (5 * 7) - 2 Step 2: 4 + 35 - 2 Step 3: 39 - 2 Step 4: 37

With the parentheses added, the expression evaluates to 37, not 45. If you want to get the result of 45, you need to modify the expression:

To obtain 45 with parentheses, the expression would be:

Step 1: (4 + 5) * 7 - 2 Step 2: 9 * 7 - 2 Step 3: 63 - 2 Step 4: 61

So, with the parentheses added, the expression evaluates to 61, not 45.

It is important to understand that adding parentheses can significantly change the value of an expression, and you need to be careful when using them to achieve a specific result.