80减去一个数的5倍．差是15，这个数是几？
直接写出得数．×30= 2÷= ÷= ﹣=÷= ××= +12.5%= ÷=
直接写得数．25×= ÷6= ×16= ÷= 1÷= ×=
直接写出得数÷= 20×= ÷= ﹣=12÷50%= 3﹣﹣= 60×20%= ÷26=+= 1﹣3%=
直接写出得数×4= 6﹣= ÷= 6÷1%=1÷= ×= ×0÷= 10+×=××5×7= 0.99×9+0.99=
直接得数．×21= ×= 15÷= ÷1﹣65%= 1+65%= ÷= ×=
×30= 2÷
÷
= 
﹣
=
÷
= 
×
×
= 
+12.5%= 
÷
=
= 
÷6= 
×16= 
÷
= 1÷
= 
×
=
÷
= 20×
÷
= 
﹣
=
= 60×20%= 
÷26=
+
= 1﹣3%=
×4= 6﹣
= 
÷
= 6÷1%=
= 
×
= 
×0÷
×
=
×
×5×7= 0.99×9+0.99=
×21= 
×
= 15÷
= 
÷
÷
= 
×
=
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