Răspuns:
1)
10.000-6x4:3:8=
10.000-24:3:8=
10.000-1=9.999
2)
10x(42:7:2:3)x10
10x(6:2:3)x10
10x(3:3)x10
10x1•10
10x10=100
3)
100:(2+56+42)•9=100:100•9=100:100:9=1•9=9
