Explicație pas cu pas:
1) 1010+101=1111
1010-101=909
1010×101=102010
1010:101=10
2)51:15=3 rest 6
3 cutii
raman 6 bomb
3)123:9=13 rest 6
41×5+23=
205+23=228
(145-5):10=
140:10=14
