竖式计算：0.6+1.4= ； 1.25+12.7= ； 6.2﹣3.9= ；4.5+2.3= ； 8.4﹣7.5= ； 1.10﹣0.3= ．
直接写出得数×24=÷= 25××= 5.8×9+5.8=+= 5÷5÷=÷÷×= 1÷2.5%=
直接写得数．×=÷= 1﹣= 0.13=（+）×8=﹣=+=×= 0÷=÷3×÷3=
用递等式计算．．
直接写出得数+= 1÷=×=÷9= （﹣0.5）÷=÷=×=÷10=﹣=÷×=
口算：+= 3﹣2= 1÷1= 7×÷7×= 5÷5=×1.2=×1=（+）×20=
×24=
÷
= 25×
×
= 5.8×9+5.8=
+
= 5÷5÷
=
÷
÷
×
= 1÷2.5%=
×
=
÷
= 1﹣
=
+
）×8=
﹣
=
+
=
×
= 0÷
=
÷3×
．
+
= 1÷
=
×
=
÷9=
﹣0.5）÷
=
÷
=
×
=
÷10=
﹣
=
÷
×
=
+
= 3﹣2
= 1
÷1= 7×
÷5=
×1.2=
×1
=（
+
）×20=
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