一百表
方块
扩展形式
用十
用加法来减
100
25-10=
15
100
43-20
23
100
33+10=
43
100
23-10
13
100
54-24
30
200
55-40
15
200
55-20
35
200
45+10
55
200
67-20=
47
200
55-25=
30
300
43-20
23
300
74-23
51
300
64-10=
54
300
38-20=
18
300
76-24=
52
400
67-34
33
400
48-9=
39
400
54-17=
37
400
82-48=
34
400
65-59=
6
500
94-16=
78
500
84-28=
56
500
78-39
39
500
56-29=
27
500
91-89=
2
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