1、红花和黄花一共有多少盆？,还有多少盆紫花。,我要搬走10盆。,红花,黄花,紫花,10 + 20 =,30,20,30-10=,个十加个十等于个十,个十减个十等于个十,4 0 + 3 0 = 7 0,3 0 + 4 0 = 7 0,7 0 - 3 0 = 4 0,7 0 - 4 0 = 3 0,摆一摆,70-20,20+20,40+20,80-50,10,80,30,50,60,70,40,20,找座位,90,-50,40,赛一赛,+20,60,-30,30,-10,20,+80,100,30,+60,90,-20,70,-30,40,+50,90,-90,0,80,+20,100,-30,70
2、,-60,10,+40,50,-30,20,90,-50,40,赛一赛,+20,60,-30,30,-10,20,+80,100,30,+60,90,-20,70,-30,40,+50,90,-90,0,80,+20,100,-30,70,-60,10,+40,50,-30,20,90,-50,40,赛一赛,+20,60,-30,30,-10,20,+80,100,30,+60,90,-20,70,-30,40,+50,90,-90,0,80,+20,100,-30,70,-60,10,+40,50,-30,20,90,-50,40,赛一赛,+20,60,-30,30,-10,20,+80,100,30,+60,90,-20,70,-30,40,+50,90,-90,0,80,+20,100,-30,70,-60,10,+40,50,-30,20,
