Problem 1. Thực hiện các phép tính sau theo modulo tương ứng: (a) 12 + 35.89 + 78.92 (mod 5)
(b) 17.43 + (−3).72 (mod 7)
(c) 36.43 + 54.972 (mod 7)
(d) 123.357.14 − 13.7 (mod 6)
(e) 45.982 − (−17).20 + 341 (mod 19)
(f) 56.16 + 17.243 (mod 16) (g) 67.32 + 34.944 (mod 31) (h) 786.123 + 73.49 (mod 12)