一年级上册数学课件5.6连加、连减 北京版(共30张PPT)

课件30张PPT。连加 连减 ? ? 10 7 + 3 = 10 10 - 3 = 75 + 2 + 15 + 2 + 1 = 7884 + 3 + ( ) = ( )?18 5 + 2 + 3 = 108 － 2 － 2 8－2－2 = 64410 - 5 - ( ) = ( )32想一想9 只 ？? 2 + 5 + 3 = 1010 - 3 - 3 = 4？3 + 4 + 1 = 5 – 2 – 1 = 4 + 3 + 2 = 10 – 6 – 2 =