口算下面各题．0.68﹣0.48= 2.7+4.3= 5.14+1.86= 2.5﹣1.4=3.3﹣0.5= 1.2﹣0.7= 5.2﹣4= 0.6+0.9=
直接写出得数 1÷=+=÷=÷3=×=﹣=÷7=÷= 4×=÷8=×=÷=÷0.5= 5×=﹣=×0= 0.3×=÷=÷4=+0.5=
直接写得数：+= 1﹣= 1÷=﹣=×= 0÷= 0.9+99×0.9=（+）×12=
直接写出得数． （1）1﹣= 1÷=﹣=×= 0÷= （2）28×0.1= 1.3×3= 2.1×0.4= 5.4÷0.9= 10﹣9.99=
直接写出得数．+=﹣=÷= 1÷=×=××= 8×+8×= 55×÷=×÷×= 0×+=
直接写得数 5﹣=×16= 1÷=÷=×=+=﹣= 6﹣=×6=（+）×8=
=
+
=
÷
=
÷3=
×
﹣
=
÷7=
÷
= 4×
=
÷8=
×
=
÷
=
÷0.5= 5×
=
﹣
=
×0= 0.3×
=
÷
=
÷4=
+0.5=
+
= 1﹣
= 1÷
=
﹣
=
×
= 0÷
= 0.9+99×0.9=（
+
）×12=
=
=
﹣
=
×
+
=
﹣
=
÷
= 1÷
=
×
=
×
×
=
+8×
= 55×
÷
×
÷
= 0×
+
=
=
×16= 1÷
=
÷
=
×
=
+
=
﹣
= 6﹣
=
×6=（
+
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