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