小开云kaiyun(中国)二年级数开云kaiyun(中国)下册练习题:口算练习5

时间:2011-05-04 20:46:00   来源:互联网     [字体: ]
13-4=   19-8=   27-4=   30+(10-4)=
14-7=   88-9=   7+73=   7+46-50=
78-40=   45+7=   53-6=   26-3+8=
44+5=   30+45=   31-9=   34-(16-7)=
56-8=   94-70=   90-8=   73-(30+20)=
12-3=   16-9=   12-4=   15-(9-3)=
13-7=   4+8=   40+8=   8+(4+2)=
30+50=   63-2=   14-8=   13-5-4=
13-8=   13-6=   78-8=   6+8-7=
12-6=   70-60=   10+6=   6+8-7=
69-7=   7+80=   6+9=   14-9+6=