十 几 减 9,苏教版一年级数学下册,教学目标,初步掌握十几减9 的计算方法。能够正确地进行十几减9 的口算。初步培养同学们的抽象思维能力。通过想加法算减法，初步渗透事物之间是相互联系的观点。,？,13 15 ( )10 ( ) 5 ( ) 7 10,14 16 ( )( ) 10 6 ( ) 10 2,3,10,17,4,10,12,？,有13个气球。,布置房间要用9个。,还剩多少个,？,13-9=？,16 9 =15 9 =14 9 =,？,14 8 = 12 9 = 11 7 = 13 6 = 16 7 = 15 8 = 17 9 = 16 8 = 18 9 =,用你自己喜欢的方法算一算,2,3,4,5,？,11,12,13,14,-9=,6,7,8,9,15,16,17,18,-9=,15 9 = 5 + 9 = 7 + 9 = 13 9 = 7 + 5= 18 9 = 16 8 = 2 + 9 =17 9 = 11 9 = 12 9 = 14 9 =,（ 注 意 +、 号 ）,（ ）- 9 = 7,？,“十几减9”你学会了吗？,
