一、选择合适的数填在 □ 里。

答案
1. 10可以分解为8和2
2. 10可以分解为9和1
3. 7可以分解为5和2
4. 10可以分解为4和6
5. 8可以分解为2和6
二、在○里填“>”“<”或“=”。
5+4○9 8○7-1 7+1○7+2
10○1+9 0+8○8 7-1○9-9
9-2○8 7○8-2 8+2○9+1
7○10-3 10-2○6 8-6○5+2
5+5○10 5○10-5 10-1○10-0
5+4○9 8○7-1 7+1○7+2
10○1+9 0+8○8 7-1○9-9
9-2○8 7○8-2 8+2○9+1
7○10-3 10-2○6 8-6○5+2
5+5○10 5○10-5 10-1○10-0
答案
1. =
2. >
3. <
4. =
5. =
6. >
7. <
8. >
9. =
10. =
11. >
12. <
13. =
14. =
15. <
2. >
3. <
4. =
5. =
6. >
7. <
8. >
9. =
10. =
11. >
12. <
13. =
14. =
15. <
三、填一填。
10 - 5 =
6 =
7 =
8 =
9 =
9 - 0 =
2 =
=
6 =
8 =
7 - 6 =
5 =
4 =
2 =
0 =
0 + 5 =
1 + 6 =
8 + 0 =
3 + 4 =
7 + 2 =
1 + 7 =
8 + 2 =
4 +
=
3 + 6 =
0 + 9 =
10 - 0 =
9 - 1 =
8 - 2 =
7 - 3 =
6 - 4 =
10 - 5 =
6 =
7 =
8 =
9 =
9 - 0 =
2 =
6 =
8 =
7 - 6 =
5 =
4 =
2 =
0 =
0 + 5 =
1 + 6 =
8 + 0 =
3 + 4 =
7 + 2 =
1 + 7 =
8 + 2 =
4 +
3 + 6 =
0 + 9 =
10 - 0 =
9 - 1 =
8 - 2 =
7 - 3 =
6 - 4 =
答案
1. 5
2. 4
3. 3
4. 2
5. 1
6. 9
7. 7
8. 5
9. 3
10. 1
11. 1
12. 2
13. 3
14. 5
15. 7
16. 5
17. 7
18. 8
19. 7
20. 9
21. 8
22. 10
23. 9
24. 9
25. 9
26. 10
27. 8
28. 6
29. 4
30. 2
2. 4
3. 3
4. 2
5. 1
6. 9
7. 7
8. 5
9. 3
10. 1
11. 1
12. 2
13. 3
14. 5
15. 7
16. 5
17. 7
18. 8
19. 7
20. 9
21. 8
22. 10
23. 9
24. 9
25. 9
26. 10
27. 8
28. 6
29. 4
30. 2
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