Va rog multtt putin ajutor cu exercitiul 1 urgent va rog frumos .

86×15=15×86 1290=1290
960×8=8×960 7680=7680
97×99=99×97 9603=9603
87×(24×15)=87×24×87×15=2088×1305
29×(53×40)=29×53×29×40
71×(18×29)=71×18×71×29
Nu am calculat pana la capăt!