一根铁丝，可以围成一个直径为4.5分米的圆，如果把这根铁丝折成一个等边三角形，这个三角形的边长是多少分米？
直接写得数．
36×
= 24÷
=
+
= 3.6﹣（1.5+1.6）=
6﹣2.98= 10×=
÷1.25=
+
﹣+=
直接写出得数．
×
= 3.7+2.5= 51÷0.25= 1.1﹣0.11=
÷
= 68÷0.4=
×
= 3.27+7.3=×6=
×
= 627﹣198= 0.1÷50%=
×15= 9﹣
= 10﹣2
= 3.8×0.1=
×=
÷50%=
×40%= 12%+25%=
0.8÷3= 280÷35= 359+199= 120%﹣70%=
1.4×45= 40÷10%= 241﹣103= 324﹣198=
2﹣1.36=﹣= 33÷
= 0.62+0.4=
0.37﹣0.3= 0.66÷0.3 100×0.48= 5x﹣3x=
35÷100= 0.4×0.5=
﹣
= 0.23÷0.1=
1﹣
= 0.8π=1﹣90%= 1+=
÷6=
直接写数对又快．
97﹣28=
÷
=
×
=
×
=
2.5×4=
+
= 8÷80%=×÷×
=
÷2=
+
= 10÷
=
×6=
×
=
÷
= 9×
= 15×（
﹣
）=
直接写得数
=
=
= 15.7+3=
=
=
= 10+10%= 3﹣3÷5= 0.9×99+0.9=