《2025年启东中学作业本七年级数学上册人教版》

1. 口算:
(1)$(-3)-(-5)=$2 (2)$0-7=$-7
(3)$7.2-(-4.8)=$12 (4)$|-1|-3=$-2
(5)$-2.5-5.9=$-8.4 (6)$1.9-(-0.6)=$2.5
(7)$2-8=$-6 (8)$-3-6=$-9
(9)$(-8)-8=$-16 (10)$0-6=$-6
(11)$0-(-6)=$6 (12)$16-47=$-31
(13)$(-\frac {2}{5})-(-\frac {3}{5})=$$\frac{1}{5}$ (14)$\frac {1}{2}-\frac {1}{3}=$$\frac{1}{6}$
(15)$0-(-\frac {3}{4})=$$\frac{3}{4}$ (16)$(-2)-(+\frac {2}{3})=$$-2\frac{2}{3}$

答案：
(1)2
(2)-7
(3)12
(4)-2
(5)-8.4
(6)2.5
(7)-6
(8)-9
(9)-16
(10)-6
(11)6
(12)-31
(13)$\frac{1}{5}$
(14)$\frac{1}{6}$
(15)$\frac{3}{4}$
(16)$-2\frac{2}{3}$

2. 计算:
(1)$-13-|-7|;$ (2)$3\frac {1}{4}-0.75;$ (3)$3\frac {7}{12}-\frac {3}{4};$
(4)$10\frac {1}{3}-\frac {26}{5};$ (5)$(-\frac {1}{2})-(-1\frac {1}{3});$ (6)$(-2\frac {7}{10})-(-3\frac {3}{5}).$

答案：
(1)-20
(2)$\frac{5}{2}$
(3)$\frac{17}{6}$
(4)$\frac{77}{15}$
(5)$\frac{5}{6}$
(6)$\frac{9}{10}$