十几减退位减法

1、会计学1十几减退位减法十几减退位减法 9+ 9+（ ）=11 9+=11 9+（ ）=14=14 8+ 8+（ ）=12 8+=12 8+（ ）=15=15 7+ 7+（ ）=13 6+=13 6+（ ）=11=115 54 47 76 65 52摆一摆,算一算15-8=15-8= 7说一说,算一算 13-7=13-7= 11-6= 11-6= 6 6 5 5 还剩多少个？还剩多少个？1414 - - 9 9 = = 5 51414 - - 5 5 = = 9 9摆一摆，算一算。10- -9=1；1+( )=( )。9+( )=12；12- -9=( )。1212 - - 9 9 = = 3

2、3你喜欢哪种方法？还可以怎样计算？33231678375246159139179127118119136911-9=16-7=11-6=29515-8=714-9=513-8=512-6=617-9= 811 9 = 12 9 = 13 9 = 14 9 = 15 9 = 16 9 = 17 9 = 18 9 = 你发现了什么？2345678911 9 = 212 9 = 313 9 = 414 9 = 515 9 = 616 9 = 717 9 = 818 9 = 911 8 = 12 8 = 13 8 = 14 8 = 15 8 = 16 8 = 17 8 = 你发现了什么？3456789

3、11 8 = 312 8 = 413 8 = 514 8 = 615 8 = 716 8 = 811 7 = 12 7 = 13 7 = 14 7 = 15 7 = 16 7 = 你发现了什么？45678911 7 = 412 7 = 513 7 = 614 7 = 715 7 = 816 7 = 911 6 = 12 6 = 13 6 = 14 6 = 15 6 = 你发现了什么？5678911 6 = 512 6 = 613 6 = 714 6 = 815 6 = 911 8 = 13 7 = 13 6 = 18 9 = 15 8 = 17 9 = 11 7 = 14 6 = 367978

4、4815 9 = 12 7 = 13 9 = 15 7 = 11 6 = 16 9 = 17 8 = 14 8 = 654857969582615 6 13 8 14 7 17 9 11 9 12 6 7送信送信 11- 11-（ ）=5 12-=5 12-（ ）=5=5 13- 13-（ ）=4 12-=4 12-（ ）=4=4 18- 18-（ ）=9 15-=9 15-（ ）=7=77 79 98 89 98 86摆一摆，算一算。10- -9=1；1+( )=( )。9+( )=12；12- -9=( )。1212 - - 9 9 = = 3 3你喜欢哪种方法？还可以怎样计算？332311 8 = 312 8 = 413 8 = 514 8 = 615 8 = 716 8 = 811 7 = 12 7 = 13 7 = 14 7 = 15 7 = 16 7 = 你发现了什么？45678911 7 = 412 7 = 513 7 = 614 7 = 715 7 = 816 7 = 911 6 = 12 6 = 13 6 = 14 6 = 15 6 = 你发现了什么？5678911 8 = 13 7 = 13 6 = 18 9 = 15 8 = 17 9 = 11 7 = 14