把一个长12厘米，宽8厘米的长方形铁丝框架改围成一个正方形，这个正方形的边长是多少厘米？
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﹣﹣= ﹣=
直接写出得数×3= ×= ﹣0.25= 72×=÷= ÷= 36÷= ÷=
= 72×
= 12÷
= 
÷3=
= 3÷
= 
×
= 
×0=
×15= 
×2= 
×
= 
×
=
÷
= 
÷3= 
÷5= 
÷
=
=
÷4=
×3= 1÷
= 1﹣
﹣
×
= 3﹣4×
=
×12= 
÷
= 
+
= 1﹣
﹣
= 
﹣
=
×3= 
×
= 
﹣0.25= 72×
=
÷
= 
÷
= 36÷
= 
÷
=
粤公网安备 44130202000953号