Question

3. Выполните действия в выражениях со скобка 1) (3378 – 2154) : 3 × 2; 2) 4242 : (7 × 3) + 1459;3) 9321 – 12 × (1836 : 6); 4) 2758 + (8921 – 8529) × 3; Пажалуйста по быстрее 30 балл​

Answer 1

Объяснение:

1) (3378-2154)÷3×2= 816

1. 3378-2154= 1224

2. 1224÷3= 408

3. 408×2= 816

2) 4242÷(7×3)+1459= 1661

1. 7×3= 21

2. 4242÷21= 202

3. 202+ 1459= 1661

3) 9321-12×(1836÷6)= 5649

1. 1836÷6= 306

2. 12×306= 3672

3. 9321- 3672= 5649

4) 2758+(8921-8529)×3= 3934

1. 8921-8529= 392

2. 392×3= 1176

3. 2758+ 1176= 3934

Answer 2

1) (3378 – 2154) : 3 × 2

To solve this expression, we need to follow the order of operations, which is parentheses, multiplication/division (from left to right), and addition/subtraction (from left to right).

First, let's solve the expression inside the parentheses: 3378 – 2154 = 1224.

Now, we divide 1224 by 3: 1224 ÷ 3 = 408.

Finally, we multiply 408 by 2: 408 × 2 = 816.

Therefore, the value of the expression is 816.

2) 4242 : (7 × 3) + 1459

Again, let's follow the order of operations.

First, we multiply 7 by 3: 7 × 3 = 21.

Now, we add 1459 to 21: 21 + 1459 = 1480.

Finally, we divide 4242 by 1480: 4242 ÷ 1480 ≈ 2.864.

Therefore, the value of the expression is approximately 2.864.

3) 9321 – 12 × (1836 : 6)

Let's solve this expression step by step.

First, we divide 1836 by 6: 1836 ÷ 6 = 306.

Now, we multiply 12 by 306: 12 × 306 = 3672.

Finally, we subtract 3672 from 9321: 9321 – 3672 = 5649.

Therefore, the value of the expression is 5649.

4) 2758 + (8921 – 8529) × 3

Let's solve this expression using the order of operations.

First, we subtract 8529 from 8921: 8921 – 8529 = 392.

Now, we multiply 392 by 3: 392 × 3 = 1176.

Finally, we add 2758 to 1176: 2758 + 1176 = 3934.

Therefore, the value of the expression is 3934.

I hope this helps! Let me know if you have any further questions.