一、生活中的运动现象
1
35 + 28 =
8 × 6 + 4 =
31 × 8 =
28 + 17 =
4 × 6 - 5 =
22 × 4 =
44 + 29 =
2 × 9 - 9 =
32 × 3 =
35 - 27 =
8 × 7 + 8 =
15 × 4 =
65 - 26 =
6 × 6 + 5 =
90 × 6 =
17 + 16 =
7 × 9 - 8 =
2 × 22 =
81 - 14 =
8 × 3 - 7 =
2 × 80 =
16 + 25 =
9 × 3 + 6 =
50 × 3 =
25 + 48 =
5 × 5 + 6 =
40 × 5 =
29 - 23 =
7 × 7 + 9 =
7 × 21 =
答案:1. $35 + 28 = 63$
2. $8 × 6 + 4 = 48 + 4 = 52$
3. $31 × 8 = 248$
4. $28 + 17 = 45$
5. $4 × 6 - 5 = 24 - 5 = 19$
6. $22 × 4 = 88$
7. $44 + 29 = 73$
8. $2 × 9 - 9 = 18 - 9 = 9$
9. $32 × 3 = 96$
10. $35 - 27 = 8$
11. $8 × 7 + 8 = 56 + 8 = 64$
12. $15 × 4 = 60$
13. $65 - 26 = 39$
14. $6 × 6 + 5 = 36 + 5 = 41$
15. $90 × 6 = 540$
16. $17 + 16 = 33$
17. $7 × 9 - 8 = 63 - 8 = 55$
18. $2 × 22 = 44$
19. $81 - 14 = 67$
20. $8 × 3 - 7 = 24 - 7 = 17$
21. $2 × 80 = 160$
22. $16 + 25 = 41$
23. $9 × 3 + 6 = 27 + 6 = 33$
24. $50 × 3 = 150$
25. $25 + 48 = 73$
26. $5 × 5 + 6 = 25 + 6 = 31$
27. $40 × 5 = 200$
28. $29 - 23 = 6$
29. $7 × 7 + 9 = 49 + 9 = 58$
30. $7 × 21 = 147$
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