用小数计算．8元5角﹣6元7角=
直接写得数．= 24÷======
直接写出得数． 12×=÷= 0÷=﹣= 12×（×）=×=÷= 20÷=+=×90×=
直接写出得数：×12= 1÷=×=+=÷2= 6﹣= 0÷=×=÷=﹣=
表示 ；表示 ．
直接写出得数．÷=×3= 6×=+×7= 100÷10%=÷1=÷7=×9×=
= 24÷
=
=
=
=
=
=
=
÷
= 0÷
=
﹣
= 12×（
×
×
=
÷
= 20÷
=
+
=
×90×
=
×12= 1÷
=
×
=
+
=
÷2=
=
×
=
÷
=
﹣
=
表示 ；
表示 ．
÷
=
×3= 6×
=
+
×7=
÷1=
÷7=
=
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