Thực hiện phép tính
1) 1234,79 – ( 234,79 – 120)
2) ( 29,67 + 35,69) – ( 19,67 – 14,31)
3) ( 59,73 + 85,659) – ( 75,659 – 40,27)
4) ( 52,34 + 45,519 – 23,45) – ( 15,519 – 47,66 – 123,45)
5) ( 54,36 - 65,59 – 87,94) – ( 14,36 – 265,59- 387,94)
Giúp e ạ !