（云阳县）只列式不计算．①凑24．（如图）②师徒两人加工一批零件，师傅单独做10天完成，徒弟单独做15天完成．现在师徒两人合做，多少天完成全部零件的．
直接写出得数．==÷2= 4÷=﹣=÷= 4﹣﹣= 0÷+=×0+9=
×14= 20÷= 1﹣÷=﹣﹣= 2.4÷40%=﹣×0= 1÷﹣÷1= 6×÷6×=
看谁算得快．×=÷=×8=+= 18×2%= 1﹣= 3.5÷18= 137﹣63﹣37= 205﹣199+95= 8.8+1.2= 8π≈ 0.33=
直接写结果÷8=÷= 1÷=（+）×12=××0= 2÷=×3=××19=
直接写出得数． （）2= 4﹣4×= 4×（+）=÷2÷= 0.77+0.33=
．
=
=
÷2= 4÷
=
﹣
=
÷
= 4﹣
﹣
= 0÷
+
×0+9=
×14= 20÷
= 1﹣
÷
=
﹣
﹣
= 2.4÷40%=
﹣
﹣
÷6×
×
=
÷
=
×8=
+
=
÷8=
÷
= 1÷
=（
+
）×12=
×
×0= 2÷
×3=
×
×19=
）2= 4﹣4×
= 4×（
+
）=
÷2÷
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