有理数的加减法——计算题专题练习
班级: 学号: 姓名: 成绩:_________ 1、加法计算(直接写出得数,每小题1分): (1) (-6)+(-8)= (4) (-7)+(+4)= (7) -3+2= (10) (-4)+6=
(2) (-4)+2.5= (5) (+2.5)+(-1.5)= (8) (+3)+(+2)=
(3) (-7)+(+7)= (6) 0+(-2)= (9) -7-4=
(11) ??3??1= (12) a???a?=
2、减法计算(直接写出得数,每小题1分): (1) (-3)-(-4)= (4) 1.3-(-2.7)= (7) 13-(-17)= (10) 0-6=
(2) (-5)-10=
(3) 9-(-21)= (5) 6.38-(-2.62)= (6) -2.5-4.5= (8) (-13)-(-17)= (9) (-13)-17= (11) 0-(-3)= (12) -4-2=
1??1??1?(13) (-1.8)-(+4.5)= (14) ????????= (15) (?6.25)???34?=
???4??3?3、加减混合计算题(每小题3分): (1) 4+5-11; (2) 24-(-16)+(-25)-15 (3) -7.2+3.9-8.4+12
(4) -3-5+7 (5) -26+43-34+17-48 (6) 91.26-293+8.74+191
(7) 12-(-18)+(-7)-15 (8) (?83)?(?26)?(?41)?(?15)
(9)(?1.8)?(?0.7)?(?0.9)?1.3?(?0.2) (10)(-40)-(+28)-(-19)+(-24)-(+32)
1
(11)(+4.7)-(-8.9)-(+7.5)+(-6) (12) -6-8-2+3.54-4.72+16.46-5.28
4、加减混合计算题(前8题每小题4分,最后两题任选一题,记5分):
?1?5??3??1??4??1?(1)15?? (2) (-1.5)++(+3.75)+?3?5??3??2??6????4? ?????????4??2??6??7??6??7?
22??2??3?2??1??1???1?(3)???5????????????5????1? (4) 4?8???3????1????2?
3??4??3?13??4??13??5??5?
?7??1??1??1?2??3??2?(5) ? (6) ??3????2????1??(?1.75)??4????5????4????3?
3??4??3??8??2??4??8??
1??5??1??1??1??3??1?(7) ???1????1????2????3????1? (8) ??1.2?2????5???3.4?(?1.2)
6??6?2??4??4???2??4?? (9)
11111111??L????L?? (10)
1?22?38?99?101?33?597?9999?1012