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．+=+=﹣0.125=
简算．
直接写出得数． 1﹣=== 23= 52= x•x•x== a×8×b==== 4×3×25=
计算下面各题．+ 1﹣+．
直接写出得数.= 1﹣40%== 52= 1÷== 3﹣==== 0.8×÷=
+
=
+
=
﹣0.125=
．
=
=
= 23= 52= x•x•x=
= a×8×b=
=
=
= 4×3×25=
+
+
．
= 1﹣40%=
= 52= 1÷
=
=
=
=
=
= 0.8×
÷
=
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