北师大版七年级数学上册有理数计算题精选 21.docx

1、北师大版七年级数学上册有理数计算题精选 21 7 9 6 ( )( ) (72) 20 (30) 6 7 9 10 1 56 4 (3)2 ( )36 9 9 4 1 3 1 1 1 4 ( ) ( )3 ( )(4 ) 3 2 2 12 2 3 1 9 7 9 (2) 1 (2) 4 8 3 5 2 ( )( ) (42) 10 (27) 2 3 5 7 1 53 2 (1)3 ( )36 6 6 6 1 8 2 1 1 1 ( ) ( )2 ( )(2 ) 2 5 3 24 4 3 3 13 6 5 (20) 5 (20) 4 12 7 5 8 ( )( ) (120) 6 (48) 8

2、3 5 6 6 62 3 (1)3 ( )25 5 5 5 1 12 1 1 1 4 ( ) ( )3 ( )(3 ) 3 5 2 40 4 5 5 1 6 8 (15) 8 (15) 4 12 5 9 6 ( )( ) (24) 2 (24) 6 7 9 1 1 74 3 (2)2 ( )18 3 3 6 2 6 1 1 1 6 ( ) ( )3 ( )(6 ) 3 16 2 20 2 5 1 20 2 4 (16) 6 (16) 7 21 5 5 6 ( )( ) (6) 2 (15) 6 3 5 4 1 54 7 (1)3 ( )30 5 5 6 1 27 2 1 1 1 ( ) ( )

3、3 ( )(2 ) 3 9 3 20 2 5 8 20 2 2 (20) 1 (20) 7 21 3 5 2 ( )( ) (102) 4 (51) 2 3 5 3 1 67 2 (2)3 ( )28 4 4 7 1 18 1 1 3 4 ( ) ( )2 ( )(2 ) 2 9 2 12 2 3 8 26 5 9 (5) 4 (5) 9 27 3 7 4 ( )( ) (12) 12 (33) 4 5 7 1 7 79 5 (1)2 ( )48 6 6 8 1 9 1 1 3 1 ( ) ( )2 ( )(6 ) 3 9 2 12 2 3 2 1 4 2 (20) 1 (20) 3 6 1

4、9 8 ( )( ) (120) 16 (60) 8 7 9 1 1 19 1 (3)3 ( )54 9 9 6 3 18 2 1 1 2 ( ) ( )3 ( )(5 ) 2 24 3 36 6 3 1 13 4 1 (13) 4 (13) 7 14 1 9 6 ( )( ) (102) 12 (45) 6 7 9 1 3 32 6 (2)3 ( )4 2 2 2 3 14 2 1 5 2 ( ) ( )2 ( )(5 ) 2 27 3 24 4 3 10 17 5 7 (5) 4 (5) 9 18 1 5 6 ( )( ) (12) 10 (18) 6 3 5 10 8 53 2 (1)2

5、 ( )54 9 9 6 3 2 1 1 3 6 ( ) ( )3 ( )(2 ) 2 9 2 40 4 5 2 10 9 2 (5) 9 (5) 3 9 3 9 4 ( )( ) (24) 18 (42) 4 7 9 1 4 89 9 (3)3 ( )27 3 3 9 1 16 1 1 5 1 ( ) ( )2 ( )(3 ) 2 9 2 24 4 3 9 17 8 3 (18) 9 (18) 8 16 5 5 6 ( )( ) (12) 8 (57) 6 3 5 3 3 17 3 (1)2 ( )8 4 4 2 2 12 1 1 1 4 ( ) ( )2 ( )(3 ) 3 12 2 20

6、 2 5 8 1 9 6 (15) 6 (15) 9 18 3 7 2 ( )( ) (18) 6 (18) 2 5 7 4 4 17 2 (3)3 ( )15 5 5 3 4 9 1 1 1 4 ( ) ( )3 ( )(4 ) 3 20 2 12 2 3 3 3 2 9 (11) 1 (11) 2 4 1 5 2 ( )( ) (72) 20 (60) 2 3 5 5 7 92 2 (1)2 ( )48 6 6 8 1 14 1 1 7 4 ( ) ( )2 ( )(3 ) 2 4 2 60 6 5 6 11 1 4 (10) 8 (10) 5 10 1 5 6 ( )( ) (90) 2

7、 (18) 6 3 5 1 2 17 7 (3)2 ( )15 3 3 5 3 16 1 1 5 4 ( ) ( )2 ( )(5 ) 2 27 2 36 6 3 1 17 1 5 (5) 6 (5) 9 18 3 9 2 ( )( ) (30) 18 (24) 2 7 9 1 1 16 1 (1)3 ( )18 3 3 6 1 12 2 1 1 1 ( ) ( )2 ( )(4 ) 2 4 3 20 2 5 9 23 9 2 (18) 8 (18) 8 24 3 9 4 ( )( ) (72) 10 (6) 4 7 9 6 1 17 5 (3)3 ( )45 5 5 9 1 15 1 1 7

8、 4 ( ) ( )3 ( )(3 ) 3 3 3 36 6 3 1 1 3 9 (7) 3 (7) 7 21 9 5 8 ( )( ) (96) 18 (27) 8 3 5 10 1 54 7 (3)2 ( )36 9 9 4 1 4 1 1 1 2 ( ) ( )2 ( )(4 ) 2 2 2 12 2 3 4 14 6 2 (2) 3 (2) 5 15 5 5 4 ( )( ) (30) 4 (6) 4 3 5 1 5 19 4 (3)2 ( )36 4 4 9 2 24 2 1 1 6 ( ) ( )2 ( )(6 ) 3 4 3 40 4 5 7 25 2 8 (15) 8 (15)

9、 8 24 1 9 8 ( )( ) (48) 20 (9) 8 7 9 3 5 16 2 (2)2 ( )20 4 4 5 1 12 1 1 7 4 ( ) ( )3 ( )(5 ) 3 8 2 60 6 5 8 1 6 7 (11) 8 (11) 7 14 3 7 2 ( )( ) (30) 16 (6) 2 5 7 5 3 82 1 (1)2 ( )28 4 4 7 1 24 1 1 1 4 ( ) ( )3 ( )(2 ) 3 8 2 12 2 3 8 1 7 1 (18) 1 (18) 9 18 3 5 2 ( )( ) (96) 4 (30) 2 3 5 1 7 16 2 (1)2

10、 ( )18 6 6 3 4 21 1 1 1 2 ( ) ( )3 ( )(2 ) 3 12 3 12 2 3 6 11 8 7 (9) 2 (9) 5 10 1 7 4 ( )( ) (84) 14 (57) 4 5 7 1 5 15 7 (3)2 ( )48 6 6 8 4 6 1 1 1 1 ( ) ( )2 ( )(4 ) 3 12 2 20 2 5 1 28 4 8 (1) 2 (1) 9 27 1 7 2 ( )( ) (84) 16 (36) 2 5 7 10 8 85 3 (3)2 ( )81 9 9 9 1 10 1 1 5 1 ( ) ( )2 ( )(2 ) 2 8 2 24 4 3 6 1 1 6 (15) 5 (15) 5 15 5 7 6 ( )( ) (36) 8 (33) 6 5 7 6 6 15 1 (3)2 ( )45