用圆规画一个周长是9.42厘米的圆，并用字母o、d标出圆心、直径．
直接写出得数．×12=+= 10×=﹣= 1÷= 12÷=÷=×=÷=÷= 18+46= 2.5×0.8= 3.8﹣0.9= 36÷2= 3.5÷0.5=
口算．==== 0.125×8== 0.37+1.3=== 2008×99+2008=
直接写出各题得数． 0.4÷40%= 0.64+3.6= 0.25×4= 0.56×=×= 5.6÷0.1%=÷2=×=÷3+3÷= 6.73×99+6.73=
直接写出结果． 1÷=÷10= 6×= 1﹣75%=÷=×= 5÷1%= 4÷=
×24= 0.2×25%=（）×20=== 2.5÷0.25= 0÷1= 42﹣4×2=
×12=
+
= 10×
=
﹣
= 1÷
=
=
÷
=
×
=
÷
=
=
=
=
=
= 0.37+1.3=
=
= 2008×99+2008=
=
×= 5.6÷0.1%=
÷2=
×
=
÷3+3÷==×= 5.6÷0.1%=÷2=×=÷3+3÷=
=
÷10= 6×
= 1﹣75%=
÷
=
×
= 5÷1%= 4÷
=
×24= 0.2×25%=（
）×20=
=
= 2.5÷0.25= 0÷1= 42﹣4×2=
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