某电影院共售出前后排电影票1050张，共收款3900元，前排每张3.5元，后排每张4元，问前后排票各多少张？
×80% 1﹣78% 100﹣56% ÷40%60%×70% 8.7×45% 1+1% 25×．1.2+20%+ ×90% 8×（1+25%） 80%÷．
口算15÷0.25= 1.5×= ×1.8= 2.5×0.4= 32×2.5=24×= 2.4+1.6= ÷= ×= ÷25%=
直接写得数．2.4×50%= += 5.8﹣0.89= 0.52=÷10= 3.9×1.1= （+）×12= 1﹣+=
3.26+2.4= = = 3.6÷0.6=1﹣0.52= 2.5×3.5×0.4= = =
直接写得数：×0.87= ÷1.2= ÷= 0.56×= 2006﹣619=6﹣= 3.2×= 0.3×0.4= 2.85+1.5= 73.05﹣3.96== = = 1÷×= 7×÷7×=
×80% 1﹣78% 100﹣56% 
÷40%
×90% 8×（1+25%） 80%÷
= 
×1.8= 2.5×0.4= 32×2.5=
= 2.4+1.6= 
÷
= 
×
= 
÷25%=
+
= 5.8﹣0.89= 0.52=
÷10= 3.9×1.1= （
+
）×12= 1﹣
+
=
= 
= 3.6÷0.6=
= 
=
×0.87= 
÷1.2= 
÷
= 0.56×
= 2006﹣619=
= 3.2×
= 0.3×0.4= 2.85+1.5= 73.05﹣3.96=
= 
= 
= 1÷
×
= 7×
÷7×
粤公网安备 44130202000953号