Răspuns:
2) (3+4)×9=7×9=63
=3×9+4×9=27+36=63
(6+2)×5=8×5=40
=6×5+2×5=30+10=40
7×(8+2)=7×10=70
=8×7+2×7=56+14=70
8×(5+4)=8×9=72
=5×8+4×8=40+32=72
7×(10-6)=7×4=28
=10×7-6×7=70-42=28
(8-5)×4=3×4=12
=8×4-5×4=32-20=12
3) a)=A ,b)=F, c)=A, d)=F, e)=A, f)=F
4) a) 4+5=9(nr copii dintr.o echipa)
b)9×2=19(total copii calificați)