(1) 8-1-7= (11) 6-2-3= (21) 7-4-1= (31) 9-4-1= (41) 8-6-1=
(2) 6-5-0= (12) 7-4-3= (22) 1-0-1= (32) 9-7-1= (42) 4-1-0=
(3) 7-6-1= (13) 3-2-0= (23) 8-3-5= (33) 8-1-3= (43) 8-2-5=
(4) 6-2-1= (14) 8-1-5= (24) 8-1-4= (34) 9-8-1= (44) 5-1-0=
(5) 9-1-2= (15) 7-0-2= (25) 6-0-6= (35) 7-3-1= (45) 6-1-4=
(6) 7-3-4= (16) 6-2-0= (26) 8-2-1= (36) 7-2-5= (46) 5-1-2=
(7) 2-0-2= (17) 7-5-2= (27) 5-4-1= (37) 9-4-3= (47) 8-5-3=
(8) 8-5-2= (18) 3-1-0= (28) 9-0-2= (38) 6-1-0= (48) 9-1-7=
(9) 6-4-0= (19) 8-0-7= (29) 8-0-8= (39) 7-4-0= (49) 9-2-4=
(10) 8-2-3= (20) 9-7-2= (30) 9-6-2= (40) 9-4-0= (50) 5-4-0=
标准答案:
(1)0 (2)1 (3)0 (4)3 (5)6 (6)0 (7)0 (8)1 (9)2 (10)3 (11)1 (12)0 (13)1 (14)2 (15)5 (16)4 (17)0 (18)2 (19)1 (20)0 (21)2 (22)0 (23)0 (24)3 (25)0 (26)5 (27)0 (28)7 (29)0 (30)1 (31)4 (32)1 (33)4 (34)0 (35)3 (36)0 (37)2 (38)5 (39)3 (40)5 (41)1 (42)3 (43)1 (44)4 (45)1 (46)2 (47)0 (48)1 (49)3 (50)1