4 + 1 = 3 + 2 = 2 + 3 =
4 + 2 = 3 + 3 = 2 + 4 =
4 + 3 = 3 + 4 = 2 + 5 =
5+=
3+=
8-2=
5+4=
9-8=
4-4=
8-8=
= (只)
8< 10> 6-=0 +7=7
109 86 6-26 19
76 01 8-44 87
58 910 2+69
72+5 3+42+6