在初中学习的初期阶段，数学作为一门基础学科，其重要性不言而喻。为了帮助初一学生巩固基础知识，提高运算能力，特整理了以下100道数学计算题目。这些题目涵盖了整数、分数、小数、百分数以及简单的代数式运算等内容，适合学生们进行练习。
整数运算
1. 34 + (-56) =
2. -78 + 123 =
3. 98 - 45 =
4. -67 - 32 =
5. 15 × (-6) =
6. -48 ÷ 6 =
7. (-12) × (-3) =
8. 72 ÷ (-9) =
分数运算
9. $\frac{1}{2} + \frac{1}{3}$ =
10. $\frac{3}{4} - \frac{1}{8}$ =
11. $\frac{2}{5} \times \frac{5}{6}$ =
12. $\frac{9}{10} ÷ \frac{3}{5}$ =
13. $\frac{5}{6} + \frac{1}{3} - \frac{1}{4}$ =
14. $2\frac{1}{3} - 1\frac{1}{2}$ =
15. $\frac{3}{4} \times 2\frac{2}{3}$ =
小数运算
16. 0.75 + 0.25 =
17. 1.5 - 0.8 =
18. 0.6 × 0.5 =
19. 1.2 ÷ 0.4 =
20. 3.5 × 0.2 =
21. 4.8 ÷ 0.6 =
百分数运算
22. 25% of 80 =
23. 150% of 40 =
24. 75% of 120 =
25. 200% of 50 =
26. 30% of 150 =
27. 50% of 240 =
28. Increase 60 by 25% =
29. Decrease 80 by 15% =
简单代数式
30. Solve for $x$: $x + 7 = 15$
31. Solve for $y$: $y - 9 = 12$
32. Simplify: $3x + 5x$
33. Simplify: $4a - 2a + 3a$
34. Expand: $2(x + 3)$
35. Factorize: $6x + 12$
混合运算
36. $(-5)^2 - 3^3$ =
37. $| -7 | + | 3 |$ =
38. $(\frac{1}{2})^2 + (\frac{1}{3})^2$ =
39. $2^3 \times 3^2$ =
40. $12 ÷ (2 + 1) - 3$ =
应用题
41. A rectangle has a length of 12 cm and a width of 8 cm. Find its area.
42. If the cost of 5 apples is $10, what is the cost of one apple?
43. A car travels 150 km in 3 hours. What is its average speed?
44. A shop offers a 20% discount on all items. How much will you pay for an item originally priced at $50?
以上仅为部分题目展示，完整的100道题目可以按照上述分类继续补充。通过这些题目，学生可以逐步掌握基本的数学运算技巧，并为后续更复杂的数学知识打下坚实的基础。希望每位同学都能通过练习提升自己的计算能力和逻辑思维！
