一个会议室的地面由1560块边长为5分米的正方形地砖铺成，这个会议室的地面有多少平方米？
直接写出得数． 0÷= 0.3+= 82+28= 0.22×100=
直接写出得数．×4=×=÷=××= 1÷= 1÷=×0.75=×14+= 1﹣=+=÷5=÷×÷=
直接写得数+=﹣= 1÷= 7×=×3=+=﹣=÷=÷4= 3÷=+= 18×=
直接写出得数：﹣= 0×=÷1= 24.26+0.4=
直接写出得数 +=﹣= 12×=×14= 20÷=×= 0×=÷=÷×12= 14×÷14×=
=
=
×4=
×
=
÷
=
×
=
= 1
÷
=
×0.75=
×14+
﹣
=
+
=
÷
×
+
=
﹣
= 1÷
= 7×
=
×3=
+
=
﹣
=
÷
÷4= 3÷
=
+
= 18×
=
﹣
=
=
÷1=
+
=
﹣
= 12×
=
×14= 20÷
=
×
= 0×
=
÷
=
÷
×12= 14×
÷14×
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