两位数减一位数(退位)的口算练习题
(2014-03-15 10:43:00)
51-4=
32-6=
97-9=
54-6=
57-9=
68-9=
95-7=
56-8=
23-5=
91-4=
32-6=
97-9=
54-6=
88-9=
52-4=
40-2=
36-8=
68-9=
51-4=
32-6=
97-9=
54-6=
57-9=
68-9=
95-7=
56-8=
23-5=
91-4=
32-6=
97-9=
54-6=
88-9=
52-4=
40-2=
36-8=
68-9=