（1）在图上标出点A（9，5）、B（5，8）、C、（5，5），再顺次连接A、B、C．
（2）将连接后得到的图形绕C点逆时针旋转90°，再向下平移3格．
（3）①求出旋转过程中A点划过的轨迹的长度．
②求出平移过程中图形所覆过的面积．
直接写出得数．
2.6+1.3= 12.4÷4= 7.5÷3= 18.6÷0.6=
2.5×4= 25÷2= 2.8÷0.4= 4.5÷0.15=
1.5×6=1 5÷0.5= 5÷2= 1.2÷0.03=
7.2÷0.9= 1.3×3= 8.5÷5= 2.6÷2=
1.8×0.2= 10÷0.1= 4.1×3= 1.7×6=
接力赛
口算
9.5×100= 1.25×8 0.25×0.9×4= 1.87×0=
3.5﹣1.5= 1.2×0.4= 3.6×0.5= 0.6×5=
0.24+0.6= 0.64×0.03= 7.8+2.2﹣1.5= 8×0.05=
0.125×8= 1.3×4= 0.4×0.6= 3×0.08=
0.35×2= 2.9×0.3= 10﹣0.9= 5.67×0=
0.8×0.01= 2.5×0.2= 2.4×0.3= 1.6×0.25=
0.17×0.3= 15×0.01= 10×0.07= 0.7×0.05=
0.2×0.05= 7.8×0.01= 0.2×0.26= 0.04×4=
12.4+2.1= 0.08×0.5= 0.14×4= 9×2.5+9×1.5=
1.8×0.5= 2.3×5= 0.3×3.6= 8×0.9+8×2.1=
2.5×4= 0.8+2.7×2= 0.05×7= 4.8+2.1+7.9=
3.4﹣1.8= 2.5+0.2×2= 0.02×0.1= 5.4﹣2.8=
0.3×0.2= 3.5×2×0.1= 0.3×0.3= 0×10.3×2.2=
0.12×0.7= 0.2×0.5= 0.92×0.4= 6.7﹣1.43=
1.2×4= 1.3×2= 1.2×0.3= 4.6+5.08=
8﹣0.72= 0.72×2.5×4= 7.2÷0.8= 0.64÷1.6=
8.7÷2.9×2.9= 4.2÷0.1= 7.2+6.5+2.8= 1.5×0.75+1.5×0.25=
6÷0.4=
2.5×4=
17.8﹣7.8=
6.6+3.4= ．