Răspuns :
Răspuns:
86×15=15×86
86×15=1290
1290=1290
960×8=8×960
960×8=7680
7680=7680
97×99=99×97
97×99=9603
9603=9603
B) 87×(24×15)=
87×360=31320
29×(53×40)=
29×2120=61480
71×(18×29)=
71×52=37062
86x15=15x86
1.290=1.290
960x8=8x960
7.680=7.680
97x99=99x97
9.603=9603
87x(24x15)=
87x360=
31.320
29x(53x40)=
29x2.120=
61.480
71x(18x29)=
71x522=
37.062
1.290=1.290
960x8=8x960
7.680=7.680
97x99=99x97
9.603=9603
87x(24x15)=
87x360=
31.320
29x(53x40)=
29x2.120=
61.480
71x(18x29)=
71x522=
37.062