17,28:(2,92+6,68)+12,64
=17,28:10+12,64
=1,728+12,64
=14,368
17,28:(2,92+6,68)+12,64
=17,28:10+12,64
=1,728+12,64
=14,368
a, 17,28 : ( 2,92 +6,68) +12,64
=17,28 : 9,6 + 12,64
=1,8+12,64
=14,44
c,13140 - 20601 : 327 - 4245
=13140 - 63 - 4245
=13077 - 4245
=8832
cau b sai de con cau d ban ghi 24 5 thi minh khong hieu la 245 hay la 24,5 hay la gi khac ban thong cam