有理数的除法
一、填空题:
1. -2的倒数是 ;-0.2的倒数是 ,负倒数是 .
2.被除数是word/media/image1_1.png,除数是word/media/image2_1.png的倒数,则商是 .
3.若word/media/image3_1.png,word/media/image4_1.png,则a 0.
4.若word/media/image5_1.png, word/media/image6_1.png,则b 0.
5.一个数的相反数是-5,则这个数的倒数是 .
6.若a·(-5)=word/media/image7_1.png,则a= .
二、解答题:
1、(1)(-0.1)÷10; (2)(-2word/media/image8_1.png)÷(-word/media/image9_1.png);
(3)word/media/image10_1.png÷(-2.5) (4)(-10)÷(-8)÷(-0. 25);
2、(1)word/media/image11_1.png; (2)0÷(-5)÷100;
(3)3.5÷(word/media/image12_1.png; (4)word/media/image13_1.png.
参考答案
一、
1、word/media/image14_1.png,-2,2;
2、6;
3、>;
4、b<0;
5、word/media/image15_1.png;
6、-word/media/image16_1.png.
二、
1、(1)word/media/image17_1.png; (2)6; (3)word/media/image18_1.png; (4)-5;
2、(1)10; (2)0; (3)48word/media/image19_1.png; (4)word/media/image20_1.png
本文来源:https://www.2haoxitong.net/k/doc/0a1ff8d226d3240c844769eae009581b6ad9bd70.html
文档为doc格式