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十 几 减 九 八 七 六 的退 位 减 法,？,13 15 ( )10 ( ) 5 ( ) 7 10,14 16 ( )( ) 10 6 ( ) 10 2,3,10,17,4,10,12,？,10-8= 10-9= 10-6= 10-5= 12-2= 17-7= 11-1= 12-2= 10-7= 10-6= 13-3= 18-8=,我有13个气球。,布置房间要用9个。,还剩多少个,？,15 8 = 13 7 = 11 6 =,？,14 8 = 12 9 = 11 7 = 13 6 = 16 7 = 15 8 = 17 9 = 16 8 = 18 9 =,请用你自己喜欢的方法算一算,9 =8 = 11 7 =6 =,6 =7 = 12 8 =9 =,2,3,4,5,6,5,4,3,？,15 9 = 5 + 9 = 7 + 9 = 13 8 = 7 + 5= 18 9 = 16 8 = 2 + 9 =17 9 = 11 7 = 12 9 = 11 8 =,（ 注 意 +、 号 ）,（ ） （ ）= 7,？,
