直接写出得数．
27+68= 7.8﹣0.8= 6.3÷0.1=
+
+
=
1﹣
=
÷
=×28= 1.25×7×8=
口算下面各题．
56+37= 80﹣16= 5+5= 12﹣1.1=
2×0.2= 2.87÷0.7=
+
=
﹣
=
= 30÷50= 25×8=
+
=
= 12×
= 1÷
= 0×
=
直接写得数．
59×101= 100﹣38.72= 4÷0.04= 515÷5= 68+6.8=
×
=
×
=
﹣
=
÷
=
直接写出下面各题的得数．
43+96= 10﹣4.7= 3.5÷40=
÷
=
÷5.25=
+6.25= 0.74×100= 1÷
=
×5+
×8= 15×（
+）=
看谁口算得又对又快．
135+398= 5﹣0.5= 0.24×50= 2﹣2÷7=
（1.25×9×8=
÷2=
=（
+
）×72=