计算下面各题． （1）15+16+17+25+44 （2）39+39+39+39 （3）58+48+38+28+8 （4）1+2+3+4+5+6+7+8+9．
直接写得数．= 4﹣1.63======== 27×5%=%==
直接写得数+=﹣=×=×=×÷×=+=×0+3= 3+1.75=÷=（+）×=
直接写得数．+0.625= 24×=÷9= （+）×12= 12×25%=÷=
直接写出得数== 3.14×8== 1﹣40%=== 52=
口算．+=×4=÷=×= 15÷=÷8= 0÷=﹣=
= 4﹣1.63=
=
=
=
=
=
=
= 27×5%=
%=
=
+
=
﹣
=
×
=
×
=
×
÷
=
=
×0+3= 3
+1.75=
÷
=（
+
）×
=
+0.625= 24×
=
÷9=
+
）×12= 12×25%=
÷
=
=
= 3.14×8=
=
=
= 52=
+
=
×4=
÷
×
=
=
÷8= 0÷
=
﹣
=
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