Răspuns
a) 2: 2²/3²+11/5×10/11= 2×3²/2²+10/5= 9/2+2= 9/2+4/2=13/2
C)( (3+4+5)/6:7/12-10/30)×1/4:(12/5-4/3)
=(12/6×12/7-1/3)×1/4:(36-20)/15
=( 144/42-1/3)×1/4:16/15
=(72/21-7/21)×1/4×15/16
=65/21×15/64
=65/7×5/64
=325/448
Explicație pas cu pas:
