□○□=□(颗)
29-9=
13-5=
31+8=
85-15=
34-26=
5+39=
69-50=
53+4=
92+5=
10-7=
97-20=
66-6=
40+30=
30+65=
68-18=
100-3=
23个
59个
70个
85
75
55
25
(颗)
9.9×5.9 60 1