100以内退位减法
10-6=
70-3=
17-9=
10-6=
88-79=
71-69=
12-6=
45-39=
66-59=
52-46=
70-3=
17-9=
91-74=
98-69=
97-29=
64-59=
62-59=
32-16=
45-27=
36-18=
95-78=
62-54=
97-89=
21-19=
68-19=
56-18=
93-56=
54-26=
92-88=
92-56=
64-39=
98-69=
97-29=
64-59=
62-59=
32-16=
45-27=
36-18=
95-78=
62-54=
97-89=
21-19=
68-19=
56-18=
93-56=
54-26=
92-88=
92-56=
64-39=
91-74=
98-69=
97-29=
64-59=
62-59=
32-16=
45-27=
36-18=
95-78=
62-54=
97-89=
21-19=
68-19=
56-18=
93-56=
54-26=
92-88=
92-56=
88-79=
71-69=
12-6=
45-39=
66-59=
52-46=
95-22=
67-29=
81-35=
33-15=
74-65=
50-26=
62-59=
51-47=
59+35=
98-69=
97-29=
64-59=
62-59=
32-16=
45-27=
36-18=
95-78=
78-24=
25-18=
96-43=
87-65=
72-18=
15-9=
58-26=
34-25=
78-34=
29-12=
85-58=
90-12=
45-19=
54-23=
23-9=
48-23=
100-54=
77-18=
45-29=
89-45=
89-45=
53-18=
69-45=
67-15=
23-6=
59-48=
53-27=
44-21=
82-28=
89-12=
76-54=
53-36=
38-29=
96-83=
87-16=
53-17=
88-21=
76-32=
27-18=
69-48=
50-20=
81-19=
53-44=
77-19=
69-32=
76-54=
42-34=
75-12=
51-40=
54-19=
25-16=
42-25=
60-31=
18-12=
51-32=
69-28=
98-89=
34-21=
34-21=
42-16=
39-12=
54-29=
80=21=
42-39=
65=45=
78-43=
12-3=
76-13=
76-65=
99-33=
70-34=
90-66=
20-12=
69-33=
70-43=
15-7=
40-21=
14-8=
19-7=
80-12=
42-28=
32-20=
71-67=
78-17=
51-15=
78-56=
72-27=
56-10=
52-18=
34-13=
17-2=
56-45=