Răspuns:
♡Bună!♡
a) 5×(2×5+1)-4×5+1= b) 5+5×(9+3×4)=
5×(10+1)-20+1= 5+5×(9+12)=
5×11-20+1= 5+5×21=
55-20+1= 5+105=110
35+1=36
c) (7×2+4)×15-11×14= d)
7×[5×3-(4×3-5)]+3×4=
(14+4)×15-154= 7×[15-(12-5)]+12
18×15-154= 7×(15-7)+12=
270-154=116 7×8+12=
56+12=68
La celelalte tot asa...nu am apucat sa fac toate!!!SORRYYYY!!!SUCCEEEESS!
°~Vio°~
