Question

Tính nhanh:

a) 477.1993 – 1993.467

b) 38 + 38.22 – 38.10 – 38.3

c) (357.45 + 74.357):119

Answer 1

a) 477.1993 – 1993.467 = 1993(477 – 467) = 1993.10 = 19930

b) 38 + 38.22 – 38.10 – 38.3 = 38.(1 + 22 – 10 – 3) = 38.10 = 380

c) (357.45 + 74.357):119 = [357.(45+74)]:119 = 357.119 : 119 = 357