课件9张PPT。8 + ( )= 128 + ( )= 148 + ( )= 158 + ( )= 174679十几减8111 – 8 =想:9 加( )得 113311 减 8 得 3213 - 8 = □想:8 加( )得 125515 - 8 = □想:8 加( )得 1477摆一摆,算一算312 - 8 = □想:8 加( )得 124416 - 8 = □想:8 加( )得 168814 - 8 = □617 - 8 = □9做一做1.□ ○ □ = □□ ○ □ = □2.8 + 5 =8 + 3 =13 – 8 =11 – 8 =8 + 7 =15 – 8 =12-84□ ○ □ = □16-88131115537510 - 3 = □7 14 - □ = □410-36( ^_^ )/~~拜拜