Question

[2+7]*5 [18+24]:6 24:[2*3] [18*8]:2

Answer 1

1 способ:

[2+7]*5 = 9 * 5 = 45,

[18+24]:6 = 42 : 6 = 7,

24:[2*3] = 24 : 6 = 4,

[18*8]:2 = 144 : 2 = 72,

2 способ:

[2+7]*5 = 2 * 5 + 7 * 5 = 10 + 35 = 45,

[18+24]:6 = 18 : 6 + 24 : 6 =  3 + 4 = 7,

24:[2*3] = 24 : 2 : 3 = 4,

[18*8]:2 = 18 : 2 * 8 = 72

Answer 2

Let's calculate the expressions step by step:

1. [2+7]*5 First, we perform the addition inside the brackets: 2 + 7 = 9. Then, we multiply the result by 5: 9 * 5 = 45. So, [2+7]*5 is equal to 45.

2. Again, we start by adding the numbers inside the brackets: 18 + 24 = 42. Next, we divide the result by 6: 42 / 6 = 7. Therefore, 18+24:6 is equal to 7.

3. 24:[23] Here, we multiply the numbers inside the brackets: 2 * 3 = 6. Then, we divide 24 by 6: 24 / 6 = 4. Thus, 24:[23] is equal to 4.

4. First, we multiply the numbers inside the brackets: 18 * 8 = 144. Next, we divide the result by 2: 144 / 2 = 72. Therefore, 18*8:2 is equal to 72.

So, the calculations are as follows:

[2+7]5 = 45 18+24:6 = 7 24:[23] = 4 18*8:2 = 72