有一堆围棋子，其中黑子与白子个数的比是4：3．从中取出91枚棋子，且黑子与白子个数的比是8：5，而剩下的棋子中黑子与白子个数的比是3：4．那么这堆围棋共有多少枚？
直接写出得数．0.49÷0.7= 0.77+0.33= 0÷=3.06﹣2.6= ×200= ÷8=0.21×= 0.52=
0.9÷0.1= 2﹣2÷3= 3÷= 1﹣﹣=190÷25÷4= 0.55×20= 1.2﹣= 2.7×=
直接写出得数．0.6÷0.3= 2÷= += ×=﹣= ÷= （+）×6= （2+）×8=
15÷0.25= 1.5×= 2.4+1= 1÷1.25×8=24×= = 10= 8+=×1.8= = = 0.78+1+0.32=
直接写出得数．1﹣45%= 0.4÷2.5= 15÷= ×= ÷= ×=
=
×200= 
÷8=
= 0.52=
= 1﹣
﹣
=
= 2.7×
=
= 
+
= 
×
=
﹣
= 
÷
= （
）×6= （2+
）×8=
= 2.4+1
= 1÷1.25×8=
= 
= 10
= 8
+
=
×1.8= 
= 
= 0.78+1
+0.32=
= 
×
= 
÷
= 
×
=
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