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🔑 Answer Key
➖ Subtract from 20
Quiz Worksheet
Name:
___________________________
Date:
June 6, 2026
Questions
1.
0 − 0 = ?
0
1
2
3
💡 Count backwards from 0 by 0.
2.
1 − 0 = ?
1
2
3
💡 Count backwards from 1 by 0.
3.
2 − 0 = ?
1
2
3
4
💡 Count backwards from 2 by 0.
4.
3 − 0 = ?
2
3
4
5
💡 Count backwards from 3 by 0.
5.
4 − 0 = ?
3
4
5
6
💡 Count backwards from 4 by 0.
6.
5 − 0 = ?
4
5
6
7
💡 Count backwards from 5 by 0.
7.
6 − 0 = ?
5
6
7
8
💡 Count backwards from 6 by 0.
8.
7 − 0 = ?
6
7
8
9
💡 Count backwards from 7 by 0.
9.
8 − 0 = ?
7
8
9
10
💡 Count backwards from 8 by 0.
10.
9 − 0 = ?
8
9
10
11
💡 Count backwards from 9 by 0.
11.
10 − 0 = ?
9
10
11
12
💡 Count backwards from 10 by 0.
12.
11 − 0 = ?
10
11
12
13
💡 Count backwards from 11 by 0.
13.
12 − 0 = ?
11
12
13
14
💡 Count backwards from 12 by 0.
14.
13 − 0 = ?
12
13
14
15
💡 Count backwards from 13 by 0.
15.
14 − 0 = ?
13
14
15
16
💡 Count backwards from 14 by 0.
16.
15 − 0 = ?
14
15
16
17
💡 Count backwards from 15 by 0.
17.
16 − 0 = ?
15
16
17
18
💡 Count backwards from 16 by 0.
18.
17 − 0 = ?
16
17
18
19
💡 Count backwards from 17 by 0.
19.
18 − 0 = ?
17
18
19
20
💡 Count backwards from 18 by 0.
20.
19 − 0 = ?
18
19
20
21
💡 Count backwards from 19 by 0.
21.
20 − 0 = ?
19
20
21
22
💡 Count backwards from 20 by 0.
22.
1 − 1 = ?
0
1
2
3
💡 Count backwards from 1 by 1.
23.
2 − 1 = ?
1
2
3
💡 Count backwards from 2 by 1.
24.
3 − 1 = ?
1
2
3
4
💡 Count backwards from 3 by 1.
25.
4 − 1 = ?
2
3
4
5
💡 Count backwards from 4 by 1.
26.
5 − 1 = ?
3
4
5
6
💡 Count backwards from 5 by 1.
27.
6 − 1 = ?
4
5
6
7
💡 Count backwards from 6 by 1.
28.
7 − 1 = ?
5
6
7
8
💡 Count backwards from 7 by 1.
29.
8 − 1 = ?
6
7
8
9
💡 Count backwards from 8 by 1.
30.
9 − 1 = ?
7
8
9
10
💡 Count backwards from 9 by 1.
31.
10 − 1 = ?
8
9
10
11
💡 Count backwards from 10 by 1.
32.
11 − 1 = ?
9
10
11
12
💡 Count backwards from 11 by 1.
33.
12 − 1 = ?
10
11
12
13
💡 Count backwards from 12 by 1.
34.
13 − 1 = ?
11
12
13
14
💡 Count backwards from 13 by 1.
35.
14 − 1 = ?
12
13
14
15
💡 Count backwards from 14 by 1.
36.
15 − 1 = ?
13
14
15
16
💡 Count backwards from 15 by 1.
37.
16 − 1 = ?
14
15
16
17
💡 Count backwards from 16 by 1.
38.
17 − 1 = ?
15
16
17
18
💡 Count backwards from 17 by 1.
39.
18 − 1 = ?
16
17
18
19
💡 Count backwards from 18 by 1.
40.
19 − 1 = ?
17
18
19
20
💡 Count backwards from 19 by 1.
41.
20 − 1 = ?
18
19
20
21
💡 Count backwards from 20 by 1.
42.
2 − 2 = ?
0
1
2
3
💡 Count backwards from 2 by 2.
43.
3 − 2 = ?
1
2
3
💡 Count backwards from 3 by 2.
44.
4 − 2 = ?
1
2
3
4
💡 Count backwards from 4 by 2.
45.
5 − 2 = ?
2
3
4
5
💡 Count backwards from 5 by 2.
46.
6 − 2 = ?
3
4
5
6
💡 Count backwards from 6 by 2.
47.
7 − 2 = ?
4
5
6
7
💡 Count backwards from 7 by 2.
48.
8 − 2 = ?
5
6
7
8
💡 Count backwards from 8 by 2.
49.
9 − 2 = ?
6
7
8
9
💡 Count backwards from 9 by 2.
50.
10 − 2 = ?
7
8
9
10
💡 Count backwards from 10 by 2.
51.
11 − 2 = ?
8
9
10
11
💡 Count backwards from 11 by 2.
52.
12 − 2 = ?
9
10
11
12
💡 Count backwards from 12 by 2.
53.
13 − 2 = ?
10
11
12
13
💡 Count backwards from 13 by 2.
54.
14 − 2 = ?
11
12
13
14
💡 Count backwards from 14 by 2.
55.
15 − 2 = ?
12
13
14
15
💡 Count backwards from 15 by 2.
56.
16 − 2 = ?
13
14
15
16
💡 Count backwards from 16 by 2.
57.
17 − 2 = ?
14
15
16
17
💡 Count backwards from 17 by 2.
58.
18 − 2 = ?
15
16
17
18
💡 Count backwards from 18 by 2.
59.
19 − 2 = ?
16
17
18
19
💡 Count backwards from 19 by 2.
60.
20 − 2 = ?
17
18
19
20
💡 Count backwards from 20 by 2.
61.
3 − 3 = ?
0
1
2
3
💡 Count backwards from 3 by 3.
62.
4 − 3 = ?
1
2
3
💡 Count backwards from 4 by 3.
63.
5 − 3 = ?
1
2
3
4
💡 Count backwards from 5 by 3.
64.
6 − 3 = ?
2
3
4
5
💡 Count backwards from 6 by 3.
65.
7 − 3 = ?
3
4
5
6
💡 Count backwards from 7 by 3.
66.
8 − 3 = ?
4
5
6
7
💡 Count backwards from 8 by 3.
67.
9 − 3 = ?
5
6
7
8
💡 Count backwards from 9 by 3.
68.
10 − 3 = ?
6
7
8
9
💡 Count backwards from 10 by 3.
69.
11 − 3 = ?
7
8
9
10
💡 Count backwards from 11 by 3.
70.
12 − 3 = ?
8
9
10
11
💡 Count backwards from 12 by 3.
71.
13 − 3 = ?
9
10
11
12
💡 Count backwards from 13 by 3.
72.
14 − 3 = ?
10
11
12
13
💡 Count backwards from 14 by 3.
73.
15 − 3 = ?
11
12
13
14
💡 Count backwards from 15 by 3.
74.
16 − 3 = ?
12
13
14
15
💡 Count backwards from 16 by 3.
75.
17 − 3 = ?
13
14
15
16
💡 Count backwards from 17 by 3.
76.
18 − 3 = ?
14
15
16
17
💡 Count backwards from 18 by 3.
77.
19 − 3 = ?
15
16
17
18
💡 Count backwards from 19 by 3.
78.
20 − 3 = ?
16
17
18
19
💡 Count backwards from 20 by 3.
79.
4 − 4 = ?
0
1
2
3
💡 Count backwards from 4 by 4.
80.
5 − 4 = ?
1
2
3
💡 Count backwards from 5 by 4.
81.
6 − 4 = ?
1
2
3
4
💡 Count backwards from 6 by 4.
82.
7 − 4 = ?
2
3
4
5
💡 Count backwards from 7 by 4.
83.
8 − 4 = ?
3
4
5
6
💡 Count backwards from 8 by 4.
84.
9 − 4 = ?
4
5
6
7
💡 Count backwards from 9 by 4.
85.
10 − 4 = ?
5
6
7
8
💡 Count backwards from 10 by 4.
86.
11 − 4 = ?
6
7
8
9
💡 Count backwards from 11 by 4.
87.
12 − 4 = ?
7
8
9
10
💡 Count backwards from 12 by 4.
88.
13 − 4 = ?
8
9
10
11
💡 Count backwards from 13 by 4.
89.
14 − 4 = ?
9
10
11
12
💡 Count backwards from 14 by 4.
90.
15 − 4 = ?
10
11
12
13
💡 Count backwards from 15 by 4.
91.
16 − 4 = ?
11
12
13
14
💡 Count backwards from 16 by 4.
92.
17 − 4 = ?
12
13
14
15
💡 Count backwards from 17 by 4.
93.
18 − 4 = ?
13
14
15
16
💡 Count backwards from 18 by 4.
94.
19 − 4 = ?
14
15
16
17
💡 Count backwards from 19 by 4.
95.
20 − 4 = ?
15
16
17
18
💡 Count backwards from 20 by 4.
96.
5 − 5 = ?
0
1
2
3
💡 Count backwards from 5 by 5.
97.
6 − 5 = ?
1
2
3
💡 Count backwards from 6 by 5.
98.
7 − 5 = ?
1
2
3
4
💡 Count backwards from 7 by 5.
99.
8 − 5 = ?
2
3
4
5
💡 Count backwards from 8 by 5.
100.
9 − 5 = ?
3
4
5
6
💡 Count backwards from 9 by 5.
101.
10 − 5 = ?
4
5
6
7
💡 Count backwards from 10 by 5.
102.
11 − 5 = ?
5
6
7
8
💡 Count backwards from 11 by 5.
103.
12 − 5 = ?
6
7
8
9
💡 Count backwards from 12 by 5.
104.
13 − 5 = ?
7
8
9
10
💡 Count backwards from 13 by 5.
105.
14 − 5 = ?
8
9
10
11
💡 Count backwards from 14 by 5.
106.
15 − 5 = ?
9
10
11
12
💡 Count backwards from 15 by 5.
107.
16 − 5 = ?
10
11
12
13
💡 Count backwards from 16 by 5.
108.
17 − 5 = ?
11
12
13
14
💡 Count backwards from 17 by 5.
109.
18 − 5 = ?
12
13
14
15
💡 Count backwards from 18 by 5.
110.
19 − 5 = ?
13
14
15
16
💡 Count backwards from 19 by 5.
111.
20 − 5 = ?
14
15
16
17
💡 Count backwards from 20 by 5.
112.
6 − 6 = ?
0
1
2
3
💡 Count backwards from 6 by 6.
113.
7 − 6 = ?
1
2
3
💡 Count backwards from 7 by 6.
114.
8 − 6 = ?
1
2
3
4
💡 Count backwards from 8 by 6.
115.
9 − 6 = ?
2
3
4
5
💡 Count backwards from 9 by 6.
116.
10 − 6 = ?
3
4
5
6
💡 Count backwards from 10 by 6.
117.
11 − 6 = ?
4
5
6
7
💡 Count backwards from 11 by 6.
118.
12 − 6 = ?
5
6
7
8
💡 Count backwards from 12 by 6.
119.
13 − 6 = ?
6
7
8
9
💡 Count backwards from 13 by 6.
120.
14 − 6 = ?
7
8
9
10
💡 Count backwards from 14 by 6.
121.
15 − 6 = ?
8
9
10
11
💡 Count backwards from 15 by 6.
122.
16 − 6 = ?
9
10
11
12
💡 Count backwards from 16 by 6.
123.
17 − 6 = ?
10
11
12
13
💡 Count backwards from 17 by 6.
124.
18 − 6 = ?
11
12
13
14
💡 Count backwards from 18 by 6.
125.
19 − 6 = ?
12
13
14
15
💡 Count backwards from 19 by 6.
126.
20 − 6 = ?
13
14
15
16
💡 Count backwards from 20 by 6.
127.
7 − 7 = ?
0
1
2
3
💡 Count backwards from 7 by 7.
128.
8 − 7 = ?
1
2
3
💡 Count backwards from 8 by 7.
129.
9 − 7 = ?
1
2
3
4
💡 Count backwards from 9 by 7.
130.
10 − 7 = ?
2
3
4
5
💡 Count backwards from 10 by 7.
131.
11 − 7 = ?
3
4
5
6
💡 Count backwards from 11 by 7.
132.
12 − 7 = ?
4
5
6
7
💡 Count backwards from 12 by 7.
133.
13 − 7 = ?
5
6
7
8
💡 Count backwards from 13 by 7.
134.
14 − 7 = ?
6
7
8
9
💡 Count backwards from 14 by 7.
135.
15 − 7 = ?
7
8
9
10
💡 Count backwards from 15 by 7.
136.
16 − 7 = ?
8
9
10
11
💡 Count backwards from 16 by 7.
137.
17 − 7 = ?
9
10
11
12
💡 Count backwards from 17 by 7.
138.
18 − 7 = ?
10
11
12
13
💡 Count backwards from 18 by 7.
139.
19 − 7 = ?
11
12
13
14
💡 Count backwards from 19 by 7.
140.
20 − 7 = ?
12
13
14
15
💡 Count backwards from 20 by 7.
141.
8 − 8 = ?
0
1
2
3
💡 Count backwards from 8 by 8.
142.
9 − 8 = ?
1
2
3
💡 Count backwards from 9 by 8.
143.
10 − 8 = ?
1
2
3
4
💡 Count backwards from 10 by 8.
144.
11 − 8 = ?
2
3
4
5
💡 Count backwards from 11 by 8.
145.
12 − 8 = ?
3
4
5
6
💡 Count backwards from 12 by 8.
146.
13 − 8 = ?
4
5
6
7
💡 Count backwards from 13 by 8.
147.
14 − 8 = ?
5
6
7
8
💡 Count backwards from 14 by 8.
148.
15 − 8 = ?
6
7
8
9
💡 Count backwards from 15 by 8.
149.
16 − 8 = ?
7
8
9
10
💡 Count backwards from 16 by 8.
150.
17 − 8 = ?
8
9
10
11
💡 Count backwards from 17 by 8.
151.
18 − 8 = ?
9
10
11
12
💡 Count backwards from 18 by 8.
152.
19 − 8 = ?
10
11
12
13
💡 Count backwards from 19 by 8.
153.
20 − 8 = ?
11
12
13
14
💡 Count backwards from 20 by 8.
154.
9 − 9 = ?
0
1
2
3
💡 Count backwards from 9 by 9.
155.
10 − 9 = ?
1
2
3
💡 Count backwards from 10 by 9.
156.
11 − 9 = ?
1
2
3
4
💡 Count backwards from 11 by 9.
157.
12 − 9 = ?
2
3
4
5
💡 Count backwards from 12 by 9.
158.
13 − 9 = ?
3
4
5
6
💡 Count backwards from 13 by 9.
159.
14 − 9 = ?
4
5
6
7
💡 Count backwards from 14 by 9.
160.
15 − 9 = ?
5
6
7
8
💡 Count backwards from 15 by 9.
161.
16 − 9 = ?
6
7
8
9
💡 Count backwards from 16 by 9.
162.
17 − 9 = ?
7
8
9
10
💡 Count backwards from 17 by 9.
163.
18 − 9 = ?
8
9
10
11
💡 Count backwards from 18 by 9.
164.
19 − 9 = ?
9
10
11
12
💡 Count backwards from 19 by 9.
165.
20 − 9 = ?
10
11
12
13
💡 Count backwards from 20 by 9.
166.
10 − 10 = ?
0
1
2
3
💡 Count backwards from 10 by 10.
167.
11 − 10 = ?
1
2
3
💡 Count backwards from 11 by 10.
168.
12 − 10 = ?
1
2
3
4
💡 Count backwards from 12 by 10.
169.
13 − 10 = ?
2
3
4
5
💡 Count backwards from 13 by 10.
170.
14 − 10 = ?
3
4
5
6
💡 Count backwards from 14 by 10.
171.
15 − 10 = ?
4
5
6
7
💡 Count backwards from 15 by 10.
172.
16 − 10 = ?
5
6
7
8
💡 Count backwards from 16 by 10.
173.
17 − 10 = ?
6
7
8
9
💡 Count backwards from 17 by 10.
174.
18 − 10 = ?
7
8
9
10
💡 Count backwards from 18 by 10.
175.
19 − 10 = ?
8
9
10
11
💡 Count backwards from 19 by 10.
176.
20 − 10 = ?
9
10
11
12
💡 Count backwards from 20 by 10.
177.
11 − 11 = ?
0
1
2
3
💡 Count backwards from 11 by 11.
178.
12 − 11 = ?
1
2
3
💡 Count backwards from 12 by 11.
179.
13 − 11 = ?
1
2
3
4
💡 Count backwards from 13 by 11.
180.
14 − 11 = ?
2
3
4
5
💡 Count backwards from 14 by 11.
181.
15 − 11 = ?
3
4
5
6
💡 Count backwards from 15 by 11.
182.
16 − 11 = ?
4
5
6
7
💡 Count backwards from 16 by 11.
183.
17 − 11 = ?
5
6
7
8
💡 Count backwards from 17 by 11.
184.
18 − 11 = ?
6
7
8
9
💡 Count backwards from 18 by 11.
185.
19 − 11 = ?
7
8
9
10
💡 Count backwards from 19 by 11.
186.
20 − 11 = ?
8
9
10
11
💡 Count backwards from 20 by 11.
187.
12 − 12 = ?
0
1
2
3
💡 Count backwards from 12 by 12.
188.
13 − 12 = ?
1
2
3
💡 Count backwards from 13 by 12.
189.
14 − 12 = ?
1
2
3
4
💡 Count backwards from 14 by 12.
190.
15 − 12 = ?
2
3
4
5
💡 Count backwards from 15 by 12.
191.
16 − 12 = ?
3
4
5
6
💡 Count backwards from 16 by 12.
192.
17 − 12 = ?
4
5
6
7
💡 Count backwards from 17 by 12.
193.
18 − 12 = ?
5
6
7
8
💡 Count backwards from 18 by 12.
194.
19 − 12 = ?
6
7
8
9
💡 Count backwards from 19 by 12.
195.
20 − 12 = ?
7
8
9
10
💡 Count backwards from 20 by 12.
196.
13 − 13 = ?
0
1
2
3
💡 Count backwards from 13 by 13.
197.
14 − 13 = ?
1
2
3
💡 Count backwards from 14 by 13.
198.
15 − 13 = ?
1
2
3
4
💡 Count backwards from 15 by 13.
199.
16 − 13 = ?
2
3
4
5
💡 Count backwards from 16 by 13.
200.
17 − 13 = ?
3
4
5
6
💡 Count backwards from 17 by 13.
201.
18 − 13 = ?
4
5
6
7
💡 Count backwards from 18 by 13.
202.
19 − 13 = ?
5
6
7
8
💡 Count backwards from 19 by 13.
203.
20 − 13 = ?
6
7
8
9
💡 Count backwards from 20 by 13.
204.
14 − 14 = ?
0
1
2
3
💡 Count backwards from 14 by 14.
205.
15 − 14 = ?
1
2
3
💡 Count backwards from 15 by 14.
206.
16 − 14 = ?
1
2
3
4
💡 Count backwards from 16 by 14.
207.
17 − 14 = ?
2
3
4
5
💡 Count backwards from 17 by 14.
208.
18 − 14 = ?
3
4
5
6
💡 Count backwards from 18 by 14.
209.
19 − 14 = ?
4
5
6
7
💡 Count backwards from 19 by 14.
210.
20 − 14 = ?
5
6
7
8
💡 Count backwards from 20 by 14.
211.
15 − 15 = ?
0
1
2
3
💡 Count backwards from 15 by 15.
212.
16 − 15 = ?
1
2
3
💡 Count backwards from 16 by 15.
213.
17 − 15 = ?
1
2
3
4
💡 Count backwards from 17 by 15.
214.
18 − 15 = ?
2
3
4
5
💡 Count backwards from 18 by 15.
215.
19 − 15 = ?
3
4
5
6
💡 Count backwards from 19 by 15.
216.
20 − 15 = ?
4
5
6
7
💡 Count backwards from 20 by 15.
217.
16 − 16 = ?
0
1
2
3
💡 Count backwards from 16 by 16.
218.
17 − 16 = ?
1
2
3
💡 Count backwards from 17 by 16.
219.
18 − 16 = ?
1
2
3
4
💡 Count backwards from 18 by 16.
220.
19 − 16 = ?
2
3
4
5
💡 Count backwards from 19 by 16.
221.
20 − 16 = ?
3
4
5
6
💡 Count backwards from 20 by 16.
222.
17 − 17 = ?
0
1
2
3
💡 Count backwards from 17 by 17.
223.
18 − 17 = ?
1
2
3
💡 Count backwards from 18 by 17.
224.
19 − 17 = ?
1
2
3
4
💡 Count backwards from 19 by 17.
225.
20 − 17 = ?
2
3
4
5
💡 Count backwards from 20 by 17.
226.
18 − 18 = ?
0
1
2
3
💡 Count backwards from 18 by 18.
227.
19 − 18 = ?
1
2
3
💡 Count backwards from 19 by 18.
228.
20 − 18 = ?
1
2
3
4
💡 Count backwards from 20 by 18.
229.
19 − 19 = ?
0
1
2
3
💡 Count backwards from 19 by 19.
230.
20 − 19 = ?
1
2
3
💡 Count backwards from 20 by 19.
231.
20 − 20 = ?
0
1
2
3
💡 Count backwards from 20 by 20.
