直接写出得数.+= 1﹣= ﹣= 2.5×3.8×4=+= 10﹣9.12= +0.25= 0.65×9+0.65=
口算×6=+=×=×6=÷=÷= 1﹣=﹣=×4=÷=
直接写得数．×= 0×=÷=÷4= 12÷= 0.3×=×÷×= 0×+=
直接写出得数 21×=÷2=×=÷=÷= 12÷= 1÷=×0=
直接写得数． 20×=÷=×=÷6=×12=×=
直接写得数．×=﹣=×=×=÷=÷=÷=÷=
+
= 1﹣
= 
﹣
= 2.5×3.8×4=
+
= 10﹣9.12= 
+0.25= 0.65×9+0.65=
×6=
+
=
×
=
×6=
÷
=
÷
= 1﹣
=
﹣
=
×4=
÷
=
×
= 0×
=
÷
=
÷4= 12÷
= 0.3×
=
×
÷
×
= 0×
+
=
=
÷2=
×
=
÷
=
÷
= 12÷
= 1÷
=
×0=
=
÷
=
×
=
÷6=
=
×
﹣
=
×
=
×
=
÷
=
÷
=
÷
=
÷
=
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