Question

- Обчисли: 1)1 4 7 * 7 8 ;2) 3 7 *3 4 15 ;3)7 1 8 *4;4)12*4 1 8 ;5) 1 3/25 * 1 13/14 ;6)8 2 9 *1 8 37

Answer 1

Ответ:

1.=20/10=2 1/10 2. =13/45 3.= 15/16. 4.=50/13=2 11/13

Answer 2

1) 1 + 4 + 7 * 7 + 8 = To solve this expression, we follow the order of operations, which is parentheses, exponents, multiplication and division (from left to right), and addition and subtraction (from left to right).

First, we perform the multiplication: 7 * 7 = 49.

Then, we perform the addition: 1 + 4 + 49 + 8 = 62.

Therefore, the answer is 62.

2) 3 + 7 * 3 + 4 + 15 = Again, we follow the order of operations.

First, we perform the multiplication: 7 * 3 = 21.

Then, we perform the addition: 3 + 21 + 4 + 15 = 43.

Therefore, the answer is 43.

3) 7 + 1 + 8 * 4 = Following the order of operations, we perform the multiplication first: 8 * 4 = 32.

Then, we perform the addition: 7 + 1 + 32 = 40.

Therefore, the answer is 40.

4) 12 * 4 + 1 + 8 = We perform the multiplication first: 12 * 4 = 48.

Then, we perform the addition: 48 + 1 + 8 = 57.

Therefore, the answer is 57.

5) 1 + 3/25 * 1 + 13/14 = First, we evaluate the division: 3/25 divided by 1/1 = 3/25 * 1/1 = 3/25.

Then, we perform the multiplication: 3/25 * 1 = 3/25.

Finally, we perform the addition: 1 + 3/25 + 13/14.

To add these fractions, we find their common denominator, which is 350.

1 = 350/350, 3/25 = 42/350, 13/14 = 325/350.

Adding these fractions gives us: 350/350 + 42/350 + 325/350 = 717/350.

Therefore, the answer is 717/350.

6) 8 + 2 + 9 * 1 + 8 + 37 = Following the order of operations, we perform the multiplication first: 9 * 1 = 9.

Then, we perform the addition: 8 + 2 + 9 + 8 + 37 = 64.

Therefore, the answer is 64.