最新课件冀教版数学二年级下册《整百数加减》课件.ppt

整百数加减,冀教版二年级数学下册,口答,50里面有_个十。,5,700里面有_个百。,7,700里面有_个十。,70,2000里面有_个千。,2,2000里面有_个百。,20,2000里面有_个十。,200,13个十是_。25个百是_。,130,2500,口算,并说一说是怎么想的。,做一做,200+400,600-400,600-200,3000+6000,9000-7000,8000-5000,口算,并说一说是怎么想的。,做一做,4000+500,4500-500,4500-4000,做一做,70+50=,120-50=,120-70=,120,70,50,做一做,400+600=,1000-600=,1000-800=,1000,400,200,做一做,800+900=,1400-600=,1700-800=,1700,800,900,800,400,700,600,900,500,1500,1300,