直接写出得数．20+5.8= = 40÷12= 0.23=1.25÷1%= = = 30.1÷5.9≈
直接写出得数×4=÷4=÷6=×6=×1=÷1=÷=÷=
直接写出得数 1÷=×5=÷= 12×=÷=÷2=×=×= 1÷7×= 0×=
直接写得数． 45×= 1÷= 1÷÷=×= 1.8﹣40%=
直接写得数 ×=÷=×=÷= 4÷=×6÷= 6×+6×=（+）×16=×= 24%×5=
口算小博士．×=÷2= 80%﹣20%= 4×25%+16×25%=×=×72%=×÷=×÷×=
= 40÷12= 0.23=
= 
= 30.1÷5.9≈
×4=
÷6=
×6=
×1=
÷
÷
=
=
×5=
÷
= 12×
=
÷2=
×
=
×
= 1÷7×
= 0×
=
= 1÷
= 1÷
÷
=
×
= 1.8﹣40%=
×
=
÷
=
×
=
÷
= 4÷
=
×6÷
+6×
=（
+
）×16=
×
= 24%×5=
×
=
÷2= 80%﹣20%= 4×25%+16×25%=
=
×72%=
×
÷
=
×
÷
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