直接写出得数．14×= ×5= ×= 12×= 3×=7×= 4.8+0.82= 3﹣2.7= （+2）×9= （﹣）×2=
直接写得数．×=+=﹣=+=×=÷=﹣=×= 14×= 20÷= 0×=×23×1=
直接写出得数．﹣= 5﹣40%﹣1.6=÷= 3.14×102=÷9= 2 5%×4=×= 6×÷6×=
直接写出得数．﹣=÷=+=×= 1÷1%=
直接写出结果（近似值符号的只要求估算）． 1﹣0.009= 0.25×101= 3÷0.03= 6π≈×=÷=+= 31×199≈
直接写得数 320÷16= 10÷1%= 0.5×0.16= 3.3﹣1.95=====
= 
×5= 
×
= 12×
= 3×
=
= 4.8+0.82= 3
﹣2.7= （
+2）×9= （
﹣
）×2=
×
=
+
=
﹣
=
+
=
×
=
=
﹣
=
×
=
= 20÷
= 0×
=
×23×1=
﹣
= 5﹣40%﹣1.6=
÷
÷9= 2 5%×4=
×
= 6×
÷6×
=
﹣
=
÷
=
+
=
×
= 1÷1%=
×
=
÷
=
= 31×199≈
=
=
=
=
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