1、(1)33 + 3 + 58 =(2)47 - 39 - 7 = (3)73 - 26 + 34 = (4)62 + 5 - 27 = (5)79 - 16 - 7 = (6)43 + 6 + 27 = (7)64 + 31 + 0 = (8)85 + 9 + 0 = (9)73 + 26 - 0 = (10)66 + 16 - 6 = (11)32 - 15 - 13 = (12)70 + 17 + 8 = (13)76 - 50 + 4 = (14)34 - 20 - 12 = (15)68 - 30 - 0 = (16)60 - 16 - 11 = (17)79 - 49 - 14 =

2、(18)87 + 4 + 7 = (19)45 + 4 + 39 = (20)74 - 70 - 3 = (1)90 + 6 + 1 = (2)58 + 26 - 10 = (3)50 + 21 + 22 = (4)91 - 89 - 0 = (5)79 - 37 - 21 = (6)75 - 38 + 59 = (7)59 + 12 + 12 = (8)45 - 39 - 1 = (9)71 + 15 - 11 = (10)99 - 32 - 30 = (11)98 + 0 + 0 = (12)80 + 19 + 0 = (13)87 - 58 + 58 = (14)55 + 10 + 23

3、 = (15)47 - 0 + 45 = (16)72 - 33 + 28 = (17)31 - 9 - 6 = (18)84 - 41 - 39 = (19)63 + 20 - 13 = (20)98 + 0 - 0 = (1)85 -( )= 39 (2)( )- 70 = 26 (3)( )- 71 = 23 (4)46 -( )= 16 (5)( )- 31 = 37 (6)( )- 80 = 8 (7)46 -( )= 23 (8)( )- 2 = 22 (9)16 +( )= 31 (10)84 -( )= 19 (11)( )- 51 = 24 (12)24 -( )= 4 (1

4、3)63 +( )= 66 (14)( )+ 19 = 73 (15)87 -( )= 69 (16)( )- 81 = 19 (17)72 -( )= 44 (18)66 -( )= 52 (19)88 -( )= 31 (20)78 -( )= 48 (1)41 + 58 + 0 = (2)89 - 57 - 12 = (3)83 - 44 - 13 = (4)86 + 6 - 4 = (5)48 + 44 - 7 = (6)31 + 53 - 9 = (7)77 + 17 + 5 = (8)82 + 0 - 4 = (9)90 - 18 - 16 = (10)68 + 23 + 3 =

5、(11)96 + 2 - 0 = (12)73 + 13 + 8 = (13)32 + 13 + 8 = (14)44 - 11 + 20 = (15)85 - 41 - 38 = (16)55 - 35 - 5 = (17)98 - 49 - 8 = (18)41 - 40 - 0 = (19)69 - 67 - 1 = (20)50 - 37 + 38 = (1)99 + 0 + 0 = (2)72 + 24 - 0 = (3)96 - 23 - 21 = (4)93 + 0 + 0 = (5)56 + 31 + 6 = (6)57 - 36 + 45 = (7)71 - 24 + 14

6、= (8)80 + 14 + 3 = (9)99 + 0 + 0 = (10)55 - 40 - 1 = (11)43 - 23 - 15 = (12)68 - 34 + 31 = (13)87 + 1 - 6 = (14)67 - 64 - 2 = (15)50 + 0 + 45 = (16)69 + 12 - 13 = (17)85 + 4 - 3 = (18)36 - 25 - 9 = (19)38 + 20 - 8 = (20)98 + 0 + 1 = (1)96 -( )= 68 (2)75 -( )= 42 (3)47 +( )= 79 (4)57 -( )= 28 (5)( )-

7、 6 = 63 (6)( )+ 29 = 59 (7)65 -( )= 39 (8)66 +( )= 81 (9)13 +( )= 75 (10)33 +( )= 34 (11)49 -( )= 19 (12)38 +( )= 65 (13)80 +( )= 82 (14)84 -( )= 2 (15)39 +( )= 66 (16)( )- 31 = 17 (17)44 -( )= 5 (18)( )- 31 = 48 (19)57 -( )= 34 (20)( )+ 66 = 77 (1)91 - 41 - 27 = (2)88 - 31 + 41 = (3)90 - 49 + 52 =

8、(4)50 - 13 - 13 = (5)90 + 1 + 1 = (6)81 + 17 - 1 = (7)56 - 30 - 0 = (8)83 + 0 - 14 = (9)43 + 16 - 6 = (10)64 + 22 + 10 = (11)32 - 18 - 2 = (12)99 - 53 - 45 = (13)74 - 12 - 12 = (14)45 - 6 + 38 = (15)71 - 55 - 12 = (16)46 + 11 - 33 = (17)87 + 9 - 0 = (18)30 - 26 - 1 = (19)95 + 0 + 4 = (20)79 - 62 + 2

9、3 = (1)87 + 8 + 4 = (2)56 + 26 - 11 = (3)86 - 22 + 0 = (4)45 + 30 - 10 = (5)77 - 8 + 10 = (6)45 - 25 - 15 = (7)34 + 16 + 28 = (8)90 + 2 + 4 = (9)39 + 24 - 31 = (10)84 + 4 - 7 = (11)79 - 72 + 49 = (12)62 + 23 - 10 = (13)50 - 41 + 29 = (14)81 - 57 + 60 = (15)40 + 44 - 0 = (16)84 + 12 + 1 = (17)84 - 83

10、 + 23 = (18)76 - 49 + 72 = (19)89 - 55 - 0 = (20)35 + 26 + 37 = (1)( )- 17 = 76 (2)( )- 46 = 52 (3)67 -( )= 19 (4)( )+ 14 = 40 (5)93 -( )= 20 (6)93 -( )= 77 (7)49 -( )= 21 (8)( )+ 13 = 39 (9)( )+ 15 = 95 (10)( )+ 19 = 33 (11)( )- 38 = 44 (12)( )+ 83 = 99 (13)( )+ 27 = 92 (14)41 -( )= 6 (15)55 -( )=

11、17 (16)28 +( )= 48 (17)( )- 52 = 7 (18)70 +( )= 89 (19)( )+ 22 = 52 (20)70 +( )= 99 (1)85 + 8 - 4 = (2)62 - 49 - 1 = (3)80 + 4 + 11 = (4)51 - 26 + 35 = (5)64 - 20 + 18 = (6)69 + 9 - 17 = (7)39 + 57 - 1 = (8)53 - 24 - 18 = (9)99 + 0 - 0 = (10)38 + 53 + 6 = (11)94 + 0 - 3 = (12)79 - 61 - 9 = (13)49 -

12、35 + 18 = (14)82 - 34 - 18 = (15)47 + 23 - 1 = (16)67 + 25 + 1 = (17)76 - 53 - 9 = (18)41 - 18 - 11 = (19)45 - 18 + 34 = (20)44 + 4 - 40 = (1)68 - 0 + 21 = (2)87 + 12 - 0 = (3)83 - 69 - 0 = (4)45 + 52 - 1 = (5)39 - 38 - 0 = (6)62 + 28 + 0 = (7)44 - 33 - 4 = (8)79 + 1 - 0 = (9)92 - 48 - 11 = (10)50 -

13、 39 - 8 = (11)49 + 11 + 5 = (12)53 - 26 + 15 = (13)59 - 32 - 20 = (14)78 + 8 + 9 = (15)71 - 17 + 39 = (16)45 - 44 - 0 = (17)83 - 31 - 10 = (18)39 + 7 + 33 = (19)44 + 24 + 12 = (20)73 - 51 + 73 = (1)49 +( )= 60 (2)79 -( )= 4 (3)26 -( )= 15 (4)( )+ 22 = 38 (5)96 -( )= 94 (6)96 -( )= 17 (7)( )+ 6 = 95

14、(8)( )+ 6 = 88 (9)( )+ 16 = 89 (10)59 +( )= 78 (11)96 +( )= 99 (12)( )+ 12 = 93 (13)( )- 14 = 7 (14)( )+ 2 = 93 (15)( )- 68 = 2 (16)77 -( )= 58 (17)73 +( )= 84 (18)79 +( )= 99 (19)97 -( )= 13 (20)100 +( )= 101 (1)77 - 66 + 47 = (2)31 + 46 + 21 = (3)35 + 63 - 0 = (4)62 + 36 - 1 = (5)98 - 75 - 21 = (6

15、)76 - 14 + 35 = (7)94 - 12 - 11 = (8)56 + 33 + 9 = (9)43 + 23 - 11 = (10)48 - 36 - 3 = (11)82 + 5 + 12 = (12)40 - 5 + 26 = (13)36 + 51 + 10 = (14)60 - 23 + 31 = (15)68 - 41 - 1 = (16)44 + 31 - 5 = (17)79 + 2 - 3 = (18)35 + 38 - 1 = (19)32 - 6 - 2 = (20)90 + 8 - 0 = (1)53 + 24 - 21 = (2)84 - 32 + 35

16、= (3)93 + 3 - 2 = (4)64 + 35 + 0 = (5)96 - 43 - 6 = (6)32 - 8 - 8 = (7)56 - 38 + 44 = (8)72 + 13 - 4 = (9)87 + 12 - 0 = (10)38 - 29 - 6 = (11)60 + 6 - 19 = (12)80 - 32 - 17 = (13)69 - 31 - 14 = (14)51 + 12 - 5 = (15)95 - 68 - 20 = (16)41 + 15 + 21 = (17)98 + 1 + 0 = (18)71 + 1 - 5 = (19)88 + 8 - 3 =

17、 (20)31 - 20 + 22 = (1)( )- 4 = 73 (2)91 -( )= 21 (3)98 -( )= 30 (4)( )+ 36 = 100 (5)( )- 19 = 68 (6)( )+ 18 = 100 (7)70 +( )= 99 (8)( )+ 9 = 64 (9)30 +( )= 75 (10)( )+ 33 = 37 (11)( )- 39 = 12 (12)( )- 57 = 34 (13)( )+ 35 = 50 (14)( )+ 8 = 70 (15)( )- 3 = 83 (16)( )- 27 = 63 (17)18 -( )= 9 (18)100

18、-( )= 83 (19)81 -( )= 66 (20)73 -( )= 13 (1)81 + 12 + 1 = (2)87 - 72 + 22 = (3)72 - 49 - 4 = (4)67 - 44 - 17 = (5)41 + 48 - 7 = (6)71 + 28 - 0 = (7)46 + 22 + 19 = (8)48 - 25 - 4 = (9)54 + 16 + 18 = (10)97 - 36 - 9 = (11)35 + 62 + 1 = (12)77 + 1 + 15 = (13)61 + 5 + 24 = (14)45 - 25 + 23 = (15)99 - 1 + 2 = (16)76 - 75 + 53 = (17)82 + 15 - 2 = (18)60 + 32 + 4 = (19)38 + 40 + 19 = (20)64 + 6 + 20 = (1)( )+ 10 = 22 (2)2