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一、填空题
1. $(-10)-(+3)=$
2. $(-7)-(-7)=$
3. $-4-4=$
4. $10-(-10)=$
5. $(+\dfrac{3}{4})-(-\dfrac{1}{5})=$
6. $(-2.5)-(-3.5)=$
7. $(-1.3)-(-9.2)=$
8. $-1.5-($
9. $\left|-4-\dfrac{4}{5}\right|=$
10. $-\dfrac{2}{7}$比$-\dfrac{1}{7}$大
1. $(-10)-(+3)=$
-13
2. $(-7)-(-7)=$
0
3. $-4-4=$
-8
4. $10-(-10)=$
20
5. $(+\dfrac{3}{4})-(-\dfrac{1}{5})=$
$\dfrac{19}{20}$
6. $(-2.5)-(-3.5)=$
1
7. $(-1.3)-(-9.2)=$
7.9
8. $-1.5-($
-4.3
$)=2.8$9. $\left|-4-\dfrac{4}{5}\right|=$
$4\dfrac{4}{5}$
10. $-\dfrac{2}{7}$比$-\dfrac{1}{7}$大
$-\dfrac{1}{7}$
.答案
1. -13
2. 0
3. -8
4. 20
5. $\dfrac{19}{20}$
6. 1
7. 7.9
8. -4.3
9. $4\dfrac{4}{5}$
10. $-\dfrac{1}{7}$
2. 0
3. -8
4. 20
5. $\dfrac{19}{20}$
6. 1
7. 7.9
8. -4.3
9. $4\dfrac{4}{5}$
10. $-\dfrac{1}{7}$
二、计算题
11. $(-18)-(+32)$
12. $-22-21$
13. $(-4)-|-7|$
14. $-\frac{1}{3}-(-12\frac{1}{3})$
15. $(+4.09)-(+6\frac{1}{4})$
16. $(-4\frac{1}{10})-(+1\frac{2}{5})$
17. $(-5.5)-(-4)-(-5.5)$
18. $-2.5-(4-5)-\left|-6\frac{1}{2}\right|$
11. $(-18)-(+32)$
12. $-22-21$
13. $(-4)-|-7|$
14. $-\frac{1}{3}-(-12\frac{1}{3})$
15. $(+4.09)-(+6\frac{1}{4})$
16. $(-4\frac{1}{10})-(+1\frac{2}{5})$
17. $(-5.5)-(-4)-(-5.5)$
18. $-2.5-(4-5)-\left|-6\frac{1}{2}\right|$
答案
11. -50
12. -43
13. -11
14. 12
15. -2.16
16. $-5\dfrac{1}{2}$
17. 4
18. -8
12. -43
13. -11
14. 12
15. -2.16
16. $-5\dfrac{1}{2}$
17. 4
18. -8
