《2025年通城学典初中数学运算能手七年级上册人教版》

一、填空题
1. $-39-(-23)-(-16)=$0
2. $(-30)-12.5+28+(-7.5)=$-22
3. $(-5)+(-\frac {1}{2})+(+2)+(-\frac {1}{3})=$$-3\frac{5}{6}$
4. $-21.56+24-(-1.56)+(-4)=$0

答案： 1. 0 2. -22 3. $-3\frac{5}{6}$ 4. 0

二、计算题
5. $10.65+(-0.3)+0.25+(-6.7)$
6. $(-17)+16+(-23)+20+(-16)$
7. $6\frac {1}{3}+(-4.6)+(-\frac {2}{5})-(-\frac {2}{3})$
8. $|-2\frac {1}{5}-(-2\frac {1}{4})|-(-1\frac {3}{4})$
9. $(-1\frac {1}{3})-(-6.25)+3\frac {1}{9}-(-1.75)+(+2\frac {2}{9})$
10. $(+3\frac {2}{5})-(-2\frac {7}{8})-(+3\frac {5}{12})-(-5\frac {3}{5})+(-1\frac {1}{8})-(-5\frac {5}{12})$

答案： 5. 3.9 6. -20 7. 2 8. $\frac{9}{5}$ 9. 12 10. $12\frac{3}{4}$