4×8= 5×7= 6×9= 7×9= 4×4=
2×5= 7×2= 8×6= 5×5= 3×8=
3×6= 9×3= 0×8= 9×9= 6×6=
56+8=
42-7=
32+5=
43-6=
40+44=
22-7=
3+38=
72-40=
9+21=
30-6=
48+9=
7+67=
25+6=
31-7=
23+7=
35+48=
51-7=
59+31=
72-27=
9×6+8=
4×8-9=
5×7+35=
6×8-30=
35÷7= 18÷9= 9×8=
9×3= 55-16= 7÷7=
9×6-8= 3×7-1=
5×7= 8×4= 9×7=
4×7= 56÷8= 35÷7=
59﹣50=
46﹣16=
46+30=
55+8=
63﹣6=
58﹣8=
43+11=
47﹣25=
42-22=(4+2)×(4-2)=12
72-32=(7+3)×(7-3)=4092-42=(9+4)×(9-4)=65
152-52=(+)×(-)
①张师傅做了200个零件;②合格率是98% ;③有196个合格的;④有4个不合格的。