Addition 2 digit
20+50=
80
30-10=
100+230=
330
30-5=
25
42+75=
117
33+15=
48
45-15=
30
360+130=
490
30-23
7
87-33=
54
40+37=
77
57-36=
21
333+250=
583
28-12=
16
which number is bigger?
60 or 30
60
52+38=
90
86-22=
64
375+389=
764
23-6=
17
which number is smaller?
70 or 30
30
76+13=
89
90-27
63
659+236=
895
30-19-
11
562-121=
441