Subtraction 20-20 (230 Facts) Flashcards
up to 20
0
Q
20-19 =
A
1
1
Q
20-20 =
A
0
2
Q
20-18 =
A
2
3
Q
20-17 =
A
3
4
Q
20-16 =
A
4
5
Q
20-15 =
A
5
6
Q
20-14 =
A
6
7
Q
20-13 =
A
7
8
Q
20-12 =
A
8
9
Q
20-11 =
A
9
10
Q
20-10 =
A
10
11
Q
20-9 =
A
11
12
Q
20-8 =
A
12
13
Q
20-7 =
A
13
14
Q
20-6 =
A
14
15
Q
20-5 =
A
15
16
Q
20-4 =
A
16
17
Q
20-3 =
A
17
18
Q
20-2 =
A
18
19
Q
20-1 =
A
19
20
Q
20-0 =
A
20
21
Q
19-19 =
A
0
22
Q
19-18 =
A
1
23
Q
19-17 =
A
2
24
Q
19-16 =
A
3
25
Q
19-15 =
A
4
26
Q
19-14 =
A
5
27
Q
19-13 =
A
6
28
Q
19-12 =
A
7
29
Q
19-11 =
A
8
30
Q
19-10 =
A
9
31
Q
19-9 =
A
10
32
Q
19-8 =
A
11
33
Q
19-7=
A
12
34
Q
19-6=
A
13
35
Q
19-5=
A
14
36
Q
19-4=
A
15
37
Q
19-3=
A
16
38
Q
19-2=
A
17
39
Q
19-1=
A
18
40
Q
19-0
A
19
41
Q
18-18=
A
0
42
Q
18-17=
A
1
43
Q
18-16=
A
2
44
Q
18-15=
A
3
45
Q
18-14=
A
4
46
Q
18-13=
A
5
47
Q
18-12=
A
6
48
Q
18-11=
A
7
49
Q
18-10=
A
8
50
Q
18-9=
A
9
51
Q
18-8=
A
10
52
Q
18-7=
A
11
53
Q
18-6=
A
12
54
Q
18-5=
A
13
55
Q
18-4
A
14
56
Q
18-3
A
15
57
Q
18-2
A
16
58
Q
18-1
A
17
59
Q
18-0
A
18
60
Q
17-17
A
0
61
Q
17-16
A
1
62
Q
17-15
A
2
63
Q
17-14
A
3
64
Q
17-13
A
4
65
Q
17-12
A
5
66
Q
17-11
A
6
67
Q
17-10
A
7
68
Q
17-9
A
8
69
Q
17-8
A
9
70
Q
17-7
A
10
71
Q
17-6
A
11
72
Q
17-5
A
12
73
Q
17-4
A
13
74
Q
17-3
A
14
75
Q
17-2
A
15
76
Q
17-1
A
16
77
Q
17-0
A
17
78
Q
16-16
A
0
79
Q
16-15
A
1
80
Q
16-14
A
2
81
Q
16-13
A
3
82
Q
16-12
A
4
83
Q
16-11
A
5
84
Q
16-10
A
6
85
Q
16-9
A
7
86
Q
16-8
A
8
87
Q
16-7
A
9
88
Q
16-6
A
10
89
Q
16-5
A
11
90
Q
16-4
A
12
91
Q
16-3
A
13
