曙光小学一年级第二学期数学100以内减法退位口算练习
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91-7=
73-26=
73-45=
42-17=
91-85=
93-88=
20-6=
80-33=
96-79=
70-33=
45-19=
92-69=
72-14=
85-18=
63-35=
62-7=
64-25=
41-14=
96-59=
43-19=
87-79=
72-27=
70-29=
31-24=
74-15=
42-34=
21-2=
35-8=
50-4=
95-27=
92-3=
91-76=
61-23=
58-19=
91-54=
92-74=
30-1=
52-38=
65-49=
90-48=
22-18=
85-27=
84-27=
43-29=
54-6=
90-27=
92-9=
93-17=
43-34=
44-29=
95-87=
41-15=
71-64=
60-41=
68-29=
56-49=
28-9=
70-63=
76-38=
82-13=
92-68=
92-59=
63-5=
20-7=
75-49=
60-35=
72-68=
45-7=
93-16=
72-23=
60-21=
40-9=
82-57=
41-32=
40-39=
21-14=
86-69=
55-46=
86-78=
83-39=
52-5=
33-9=
94-56=
21-13=
98-39=
83-64=
61-12=
21-16=
91-67=
72-25=
90-35=
75-17=
81-25=
84-38=
94-15=
40-23=
61-53=
83-6=
75-56=
94-19=