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