先画一条通过A、B的直线，再画一个通过A、B两点的最小的圆，并标明圆心与直径．
直接写出得数．×= 1÷= ÷60%= ×15=﹣= 4.5+= ×= 6.8÷10%=
直接写得数24×= 72×= 12÷= ÷3=0÷= 3÷= ×= ﹣×0=
口算×15= ×2= ×= ×=÷= ÷3= ÷5= ÷=
画一画．（1）=（2）÷4=
直接写结果：×3= 1÷= 1﹣﹣= ×= 3﹣4×=×12= ÷= += 1﹣﹣= ﹣=
×
= 1÷
= 
÷60%= 
×15=
﹣
×
= 6.8÷10%=
= 72×
= 12÷
= 
÷3=
= 3÷
= 
×
= 
×0=
×15= 
×2= 
×
= 
×
=
÷
= 
÷3= 
÷5= 
÷
=
=
÷4=
×3= 1÷
= 1﹣
﹣
×
= 3﹣4×
=
×12= 
÷
= 
+
= 1﹣
﹣
= 
﹣
=
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