0.4×0.3= 2.5×0.6= 8.8×0.1= 1.3×0.2=5.28+1.6= 10﹣1.7﹣2.3= 6.09×0= 100×0.7=
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=
+
+
=
=
÷
=
+
=
﹣
=
= 30÷50= 25×8=
+
=
= 12×
= 1÷
= 0×
=+=﹣== 30÷50= 25×8=+== 12×= 1÷= 0×=
×
=
×
=
﹣
=
÷
=
÷
=
÷5.25=
+6.25= 0.74×100= 1÷
=
×5+
×8= 15×（
+
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=（
+
）×72=
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