《2025年一本计算题满分训练七年级数学全一册人教版》

1. 计算:
(1)$(-7.6)-13+15-(-7.6)-(-23)+(-15)$;
(2)$(+10.4)-7.5+12.7-(-3.6)+(-1.7)-2.5$;
(3)$(+4.1)+(-\frac {1}{3})+(-13)+(-3\frac {2}{3})+(-2.4)+0.3+(-6)$;
(4)【一题多解】$1-3-5+7+9-11-... -2021+2023+2025$.

答案：
(1)10
(2)15
(3)-21
(4)2025

2. 计算:
(1)$\frac {5}{4}+[2\frac {1}{3}-(1\frac {3}{4}-1\frac {2}{3})]$;
(2)$(3\frac {3}{5}+1\frac {4}{5}-1.4)-[2\frac {1}{6}-4.8-(-4\frac {5}{6})]$;
(3)【易错】$|\frac {4}{7}-\frac {2}{5}|-|\frac {3}{5}-\frac {7}{9}|+|\frac {2}{9}-\frac {3}{7}|$;
(4)$|\frac {1}{3}-\frac {1}{2}|+|\frac {1}{4}-\frac {1}{3}|+|\frac {1}{5}-\frac {1}{4}|+... +|\frac {1}{2023}-\frac {1}{2022}|$.

答案：
(1)$3\frac{1}{2}$
(2)$\frac{9}{5}$
(3)$\frac{1}{5}$
(4)$\frac{2021}{4046}$