x
1,000,000,000,000,000,000 x 1
1,000,000,000,000,000,000
56 + 44
57-56
=1
79-61
=18
5 x 4
20
37+78
=105
72-53
=19
86-45
=41
30 x 0
0
72+99
=71
89-77
=12
32-17
=15
11 x 12
132
372+28
=400
69-52
=17
103-87
=16
100,000,000,000,000,000,000 x 0
237+ 885
1,359
56-49
=7
153-87
=66