plsssss ma ajutati ma voi abona la toți

a) a doua rezolvare (5×4)+(5×3)=20+15=35
b) I 8×7=56. II. (8×9)-(8×2)=72-16=56
c) I 6×9=54. II. (6×2)+(6×3)+(6×4)=12+18+24=54
d) I. 5×7=35. II. (5×6)-(5×3)+(5×4)=30-15+20=35