如图：A点用数对表示为（3，1），B点用数对表示为 ，C点用数对表示为 ，三角形ABC是 三角形．画出将三角形向左平移3格后的图形．
口算：
2005﹣1998= 1.6×0.05= 5.7÷0.19= 0.125×0.7=
÷
=÷6=
÷
= 40×
=
÷
=
×12=
×
=
×201﹣=
2.25×4= 1.01﹣0.91= 1÷0.01=
÷
=
÷5.25=
+6.25= 0.74×100= 742+258= 7×
÷7×
= 10﹣3.2﹣5.8=
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=