直接写得数． 0.23= 1.7﹣0.25﹣75%= 32×0.25= 5.2÷10%=5﹣= 2.5+= （﹣）×42= 0.25××4=
470÷2.5÷40．
0.8××1.25×4．
752×1.25+4.45×12.5+0.035×125．
====
4.95×99+4.95．
= 2.5+
﹣
）×42= 0.25×
×4=
×1.25×4．
=
=
=
=
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