三年级同学做纸花，全班36人，平均每人做5朵纸花。纸花做好后，送给幼儿园小朋友80朵，余下的布置教室。布置教室用了多少纸花？,Q:J)}1^:@1P(t,t5J(i)O5f'[(U8i
算式：提示;H1E;h,Q5a,W0z4I,Q:J)}1^:@1P(t,t5J(i)O5f'[(U8i
答：布置教室用了7a,s-M5V/t)s0O1Q纸花.,Q:J)}1^:@1P(t,t5J(i)O5f'[(U8i