What's the solution to 49 and 9 / 21 + (- 78.12) + 27 and 2 / 21 + (- 21.79)

What's the solution to 49 and 9 / 21 + (- 78.12) + 27 and 2 / 21 + (- 21.79)

49+9/21-78.12+27+2/21-21.79=-23.3862

1, 58 is larger than 27 ()? 49 is smaller than 89 ()? 2, the number 20 larger than 60 is ()? The number 20 smaller than 45 is ()?

31 40 80 25

What's the fourth number from 58

58+4-1=61

Calculation questions (58:58:35)
∣ 1－√3 ∣ +［10－√2］0－［1÷3］－1

∣ 1－√3 ∣ +〔10－√2〕0－〔1÷3〕－1
= √3 - 1 + 0 - 1/3 -1
= √3 - 7/3
If the square of 1 is 1, the square of √ 3 is 3, and 1 is less than 3, so 1 is less than √ 3