直接写得数．
19×9+19=
100﹣2.02=
30÷30%=
+
=
×
=
1÷﹣÷1=
+÷+=
1+2+3+4+5+6+5+4+3+2+1=
直接写出得数．
27+58= 910﹣540= 7.8÷10= 78﹣0.98=
=
7﹣
=
=
=
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=