It's said to be a first grade problem Sorry, it's four brackets, that is: fill in the correct number in the brackets, regular: 10,20,11,18,12,16,13,14, () Better have an explanation

It's said to be a first grade problem Sorry, it's four brackets, that is: fill in the correct number in the brackets, regular: 10,20,11,18,12,16,13,14, () Better have an explanation

10,20,11,18,12,16,13,14,（14）（12）（15）（10）
10,11 ,12 .
20,18,16.

Fill in the brackets with the appropriate number: () 5 / 24 = 15 / 24 = 6 / 16 + ()

Front (8) back (4)
5 out of 8 is equal to 15 out of 24 After X3, and then you can find the least common multiple of 24 and 16, which is 48. 15 out of 24 multiplied by 2 will get 30 out of 48. 16 out of 16? X3 will also get 30 out of 48. At this time, 24 should be filled in the brackets of 6 + (24), and then the score will be 10 out of 16. 6 + (4) = 10

There are four numbers, and the sum of every three is 20, 22, 24 and 27. What are these four numbers?

Sum = (20 + 22 + 24 + 27) △ 3 = 31
What are the four numbers
31-20=11
31-22=9
31-24=7
31-27=4

-How to calculate 3.14 × 35.2 + 6.28 × (- 23.3) - 1.57 × 36.4

Multiply first, then add and subtract. - 313.372