直接写出得数．
578+216= 18.25﹣3.3= 3.2﹣
=
×8.1=+
=
÷3=
0.99×9+0.99=×
=
口算．
530﹣399= 9.6÷0.6=
÷6= 25+75÷25+75=
0.5
=
=
=
×9=
直接写出得数：
142﹣69= 0.56÷8= 1.2×
=
5.4+9= 0.6×0.6= 7
÷0.8=
5.1÷0.01= 1
÷175%= 3﹣
﹣
=
×5×7=
直接写出得数
3500﹣800= 0.4×0.2= 19﹣0.9=
8÷
= 204÷12=
+
=
+
= 0.9+99×0.9=
直接写得数．
46+315= 12.8﹣7.6= 25×28= 3.14÷0.1=
0.24×
=
+
=
÷=
﹣0.25=
×
= 1÷=
÷
= 80×40%=