一、口算:(16分)
44-8= 34-5= 83-6= 45-23=
43-12= 63-12= 53-40= 89-85=
96-50= 78-23= 56-24= 89-58=
43+ 25= 12+ 46= 47+13= 25+ 14=
67-24= 65-6= 77-34= 96-61=
75-25= 54-14= 67-56= 56-9=
42+9= 43+3= 48+4= 25+3=
30-7= 21-15= 75-26= 35-13=
53-42= 85-42= 47-30= 27-8=
86-40= 48-13= 76-42= 54-35=
34+ 15= 24+ 36= 51+13= 47+ 14=
77-34= 84-16= 42-24= 66-16=
33+4= 23+9= 18+12= 9+26=
25+8= 24+7= 24+6= 38+7=
25-15= 43-11= 77-26= 32-9=
34+8= 49+5= 42+31= 24+16=
36-8= 3×5= 4×6= 24+60-7=
4×4= 87-27= 5×6= 2×6-6=
69-26= 5×4= 2×1= 6×3-5=
2×4= 26-17= 38+7= 2×5+13=
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