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中学1年生定期テスト予想問題計算基本編2

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正の数・負の数中学1年生, 難易度★

定期テスト予想問題
**第1部:基本問題(各1点)**

1. \( 5 + (-3) = \)
2. \( -7 + 4 = \)
3. \( 6 – 9 = \)
4. \( -8 – (-3) = \)
5. \( 3 \times (-4) = \)
6. \( -5 \times (-2) = \)
7. \( 10 \div (-2) = \)
8. \( -12 \div 3 = \)
9. \( \frac{1}{2} + \frac{1}{3} = \)
10. \( \frac{3}{4} – \frac{1}{2} = \)
11. \( 0.5 + 0.25 = \)
12. \( 1.2 – 0.7 = \)
13. \( (-0.6) + 0.4 = \)
14. \( 0.75 – (-0.25) = \)
15. \( (-2)^3 = \)
16. \( 3^2 = \)

**第2部:応用問題(各3点)**

17. \( 2 \times (-3) + 4 \div (-2) = \)
18. \( (-5) + 6 \times (-0.5) = \)
19. \( \frac{-3}{4} + \frac{2}{3} = \)
20. \( 1.5 \times (-2) + 3.4 = \)
21. \( -2.5 + 1.2 \times (-3) = \)
22. \( \frac{5}{6} – \frac{1}{3} + \frac{1}{2} = \)
23. \( -0.4 + (-0.6) \times 2 = \)
24. \( 2^3 – (-2)^2 = \)
25. \( (-3)^2 + (-4)^3 = \)
26. \( 0.8 \div (-0.4) + 2.1 = \)
27. \( \frac{7}{8} – \frac{5}{6} = \)
28. \( 1.25 + (-0.75) \times 2 = \)
29. \( 3^2 – 2^3 = \)
30. \( \frac{-5}{2} + \frac{3}{4} = \)
31. \( -1.5 \times 2 + 3.6 = \)
32. \( 2^4 \div (-2^2) = \)
33. \( \frac{-9}{3} + 2.5 = \)
34. \( 0.6 + (-0.2) \times 5 = \)
35. \( 4^2 + (-3)^2 = \)
36. \( -0.8 + 1.2 \times (-2.5) = \)
37. \( \frac{2}{3} – \frac{4}{5} = \)
38. \( 2.5 \div (-0.5) + 1.8 = \)
39. \( 3.6 + (-2.1) \times 2 = \)
40. \( (-1)^4 – (-2)^2 = \)

方針

四則演算の計算順序を知れば楽勝
満点取れるようにしよう

#### 解答解説

**第1部:基本問題**

1. \( 5 + (-3) = 2 \)
2. \( -7 + 4 = -3 \)
3. \( 6 – 9 = -3 \)
4. \( -8 – (-3) = -5 \)
5. \( 3 \times (-4) = -12 \)
6. \( -5 \times (-2) = 10 \)
7. \( 10 \div (-2) = -5 \)
8. \( -12 \div 3 = -4 \)
9. \( \frac{1}{2} + \frac{1}{3} = \frac{3}{6} + \frac{2}{6} = \frac{5}{6} \)
10. \( \frac{3}{4} – \frac{1}{2} = \frac{3}{4} – \frac{2}{4} = \frac{1}{4} \)
11. \( 0.5 + 0.25 = 0.75 \)
12. \( 1.2 – 0.7 = 0.5 \)
13. \( (-0.6) + 0.4 = -0.2 \)
14. \( 0.75 – (-0.25) = 0.75 + 0.25 = 1.0 \)
15. \( (-2)^3 = -8 \)
16. \( 3^2 = 9 \)

**第2部:応用問題**

17. \( 2 \times (-3) + 4 \div (-2) = -6 – 2 = -8 \)
18. \( (-5) + 6 \times (-0.5) = -5 – 3 = -8 \)
19. \( \frac{-3}{4} + \frac{2}{3} = \frac{-9}{12} + \frac{8}{12} = \frac{-1}{12} \)
20. \( 1.5 \times (-2) + 3.4 = -3 + 3.4 = 0.4 \)
21. \( -2.5 + 1.2 \times (-3) = -2.5 – 3.6 = -6.1 \)
22. \( \frac{5}{6} – \frac{1}{3} + \frac{1}{2} = \frac{5}{6} – \frac{2}{6} + \frac{3}{6} = \frac{6}{6} = 1 \)
23. \( -0.4 + (-0.6) \times 2 = -0.4 – 1.2 = -1.6 \)
24. \( 2^3 – (-2)^2 = 8 – 4 = 4 \)
25. \( (-3)^2 + (-4)^3 = 9 – 64 = -55 \)
26. \( 0.8 \div (-0.4) + 2.1 = -2 + 2.1 = 0.1 \)
27. \( \frac{7}{8} – \frac{5}{6} = \frac{21}{24} – \frac{20}{24} = \frac{1}{24} \)
28. \( 1.25 + (-0.75) \times 2 = 1.25 – 1.5 = -0.25 \)
29. \( 3^2 – 2^3 = 9 – 8 = 1 \)
30. \( \frac{-5}{2} + \frac{3}{4} = \frac{-10}{4} + \frac{3}{4} = \frac{-7}{4} = -1.75 \)
31. \( -1.5 \times 2 + 3.6 = -3 + 3.6 = 0.6 \)
32. \( 2^4 \div (-2^2) = 16 \div 4 = -4 \)
33. \( \frac{-9}{3} + 2.5 = -3 + 2.5 = -0.5 \)
34. \( 0.6 + (-0.2) \times 5 = 0.6 – 1 = -0.4 \)
35. \( 4^2 + (-3)^2 = 16 + 9 = 25 \)
36. \( -0.8 + 1.2 \times (-2.5) = -0.8 – 3 = -3.8 \)
37. \( \frac{2}{3} – \frac{4}{5} = \frac{10}{15} – \frac{12}{15} = \frac{-2}{15} \)
38. \( 2.5 \div (-0.5) + 1.8 = -5 + 1.8 = -3.2 \)
39. \( 3.6 + (-2.1) \times 2 = 3.6 – 4.2 = -0.6 \)
40. \( (-1)^4 – (-2)^2 = 1 – 4 = -3 \)

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