a=71/69+60/47+67/69+34/47
tính a=71/69+60/47+67/69+34/47
23+45+34+67+89+14+67+69+34=
Tính giá trị biểu thức
M = 2005+(53-54-55+56)+(57-58-59+60)+(61-62-63+64)+(65-66-67+68)+69
11 + 13 + 15 + ... + 69 + 71
Tính nhanh: 23 x 45 x ( 45 x 24 - 69 ) x 67
65+891+135+989 / 731-47+69-253 = ?
65+89+175+909/731-47+69-253
65+891+135+909/731-47+69-253