直接写得数
5.8﹣5.8×0= 4﹣
﹣
= 0.25×4×2= 4.5+5.5= 0.5×2﹣0.5=
（4+5）×30= 8.01+99×8.01= （
×
）÷（
×
）= 6+25×2= 100﹣25×4=
直接写得数
5.8﹣5.8×0= 4﹣﹣= 0.25×4×2= 4.5+5.5= 0.5×2﹣0.5=
（4+5）×30= 8.01+99×8.01= （×）÷（×）= 6+25×2= 100﹣25×4=
= ÷72≈ %
=
=
= ÷ ．
=
=
=
，
=
=
9÷ =
=
=
=
．
= %．
=0.375=21÷ =6： = %．
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