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

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