Cho biểu thức A - ( 7 - 2/5 + 1/3) - (6 - 4/3 + 6/5) - (2 - 8/5 + 5/3)
Giải thích
A=7−25+13−6−43+65−2−85+53
A=7−25+13−6+43−65−2+85−53
A=7−6−2+−25−65+85+13+43−53
A = -1+ 0 + 0 = -1
A=7−25+13−6−43+65−2−85+53
A=7−25+13−6+43−65−2+85−53
A=7−6−2+−25−65+85+13+43−53
A = -1+ 0 + 0 = -1