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