两位数减一位数退位口算题
部编版二年级数学上册退位减法(两位数减一位数)
三、知识运用
6. 数学真奇妙，任意选一个两位数，试一试。
任意选一个两位数，把它 的个位与十位的数字相加， 然后用原来的两位数减去新 得到的和。这时在表中查出 你刚刚通过减法运算得到的 那个数。
无论你最初选的什么数， 你查到的数旁边一定是蓝色 （深蓝色或浅蓝色）。
四、课堂作业
作业：第19页“做一做”。 第21页练习三，第7题、第8题。
100以内的加法 和减法（二）
退位减
一、复习导入
（一）口算我最棒
16－8＝8 10－4＝ 615－7＝ 182－5＝ 177－8＝
9
11－6＝ 5 12－8＝ 410－5＝ 153－7＝ 186－9＝
9
（二）算一算，连一连
43－21
64－32
56－41
77－43
15 34 32 22
二、探究新知
三、知识应用
27 12 5 7 20 7 27
35 14 9 5 30 5 35
先圈一圈，再计算。
三、知识应用
76－4＝72 57－3＝54 64－3＝61
不退位减法
76－8＝68 57－9＝48 64－8＝56
退位减法
先6第减算一86组不－都够4是＝减个2，，位先够 再算减算1，67十－0位＋8＝上2＝8的，7数2再。没 算变6，0是＋不8＝退6位8。减法。
49
39
改：４３ 改：７３ 改：５３
－５
－４ －８
３８
６９
４５
√
√
√
这节课，我们学习了什么数学知识？
两位数减一位数的退位减法
个位上的数不够减，从十位上退1作10再减。
3４－6＝ 2８（个）
3４ －6
二年级数学上册两位数减一位数退位减法
口算：
.
74-9= 65
. 45-7=38
.
.
65-6=59 80-4=76
第三题：算算我能行。
76-4= 72 57-3= 54 67-5= 62
. 32-5= 27
. 46-9= 37 . 57-8= 49
十位数不变 不退位减法
十位数减少了一个十 退位减法
第四题：填填，我能行！
两位数减一位数 （退位减法）
2
我只有8元，想买一 辆 ，还要再攒
多少元？ 36－8＝（ 28）(元)
2
36 － 8 ＝（ ）
我们用1根小棒代表1元，应该先拿 出几根小棒？怎样快速的拿出来呢？
合作探究
1、先认真阅读68页两位同学的对话， 再用小棒摆一摆。
2、与你小组内的同学一起探究：当个位 减个位不够减的时候，我们应该怎么办 呢？
72 （ ） 62
对的打.“ ”错的打“ ”，并订正。
42
-7
3. 5 （ ）2
小结：
竖式计算： 1、数位对齐； 2、先从个位算起； 3、个位不够减时， 向十位借1再减。
聪明题 . 61
-8
53
. 54 -7
47
谢
谢
课前口算
①10－4＝ ②24－10＝ ③12－4＝ 10－8＝ 64－10＝ 16－8＝ 10－6＝ 53－10＝ 11－7＝ 10－3＝ 78－10＝ 13－4＝ 10－5＝ 36－10＝ 14－6＝ 你能看出来上面的每组口算题有什么特 点吗？
811118个，.还剩多少个?
24-8=16（个）
小结：
• 两位数减一位数，先从（个）位算起。 • 个位不够减时，向（十）位借1。
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退位减法口算练习题班级_______________ 姓名__________________81-7= 36-7= 31-7= 10-3= 34-5= 55-8= 15-9= 12-4= 55-9= 25-6= 20-6= 62-9= 92-7= 74-9= 23-6= 10-5= 92-5= 10-8= 31-5= 12-4= 92-5= 65-8= 50-4= 16-8= 12-6= 75-7= 15-6= 82-5= 93-9= 45-7= 85-9= 92-8= 31-6= 62-5= 45-9= 10-6= 82-5= 95-8= 23-4= 50-3= 43-4= 70-5= 31-7= 51-2= 82-3= 92-5= 25-9= 44-6= 73-8= 90-6= 76-7= 32-9= 10-7= 33-5= 70-2= 12-7= 46-8= 45-6= 41-7= 23-9= 90-7= 10-4= 72-6= 21-5= 23-5= 81-2= 52-4= 73-6= 81-5= 16-8= 70-4= 80-8= 44-6= 60-5= 51-5= 80-9= 72-4= 94-5= 13-8= 64-8= 31-5= 20-2= 13-7= 32-4= 71-6= 53-7= 51-3= 50-5= 72-3= 67-8= 74-9= 50-2= 61-5= 27-9= 32-3= 72-7= 70-5= 32-6= 73-7= 60-3= 61-7= 50-1= 45-6= 63-6= 40-8= 47-8= 27-8= 63-4= 82-3= 44-8= 43-5= 96-9= 71-3= 52-4= 72-9= 51-3= 80-5= 50-2= 93-4= 30-9=退位减法口算练习题班级_______________ 姓名__________________31-4= 85-6= 41-7= 32-3= 30-2= 35-8= 81-4= 60-8= 92-3= 31-4= 22-3= 35-7= 10-1= 83-8= 66-7= 56-7= 73-9= 90-8= 60-4= 44-7= 71-7= 65-9= 96-9= 15-9= 82-9= 42-5= 13-6= 20-5= 13-5= 63-4= 80-8= 18-9= 10-1= 82-9= 22-5= 32-3= 22-5= 98-9= 91-2= 62-7= 41-4= 65-7= 64-6= 12-4= 60-2= 55-8= 30-8= 62-9= 91-6= 44-6= 21-4= 54-6= 62-3= 77-9= 30-7= 20-2= 30-3= 70-6= 50-3= 25-9= 12-3= 92-8= 65-8= 10-7= 11-5= 81-8= 25-6= 63-6= 16-9= 42-4= 51-6= 41-5= 81-5= 13-6= 11-2= 54-6= 62-3= 64-8= 24-7= 41-4= 75-7= 22-7= 71-9= 20-2= 12-8= 21-2= 91-4= 53-8= 61-8= 56-7= 15-6= 26-9= 22-9= 78-9= 60-5= 94-7= 61-9= 54-5= 78-9= 46-7= 71-2= 80-4= 91-6= 83-5= 50-9= 90-3= 75-9= 11-6= 53-7= 31-2= 85-9= 95-8= 92-6= 70-9= 11-5= 12-3= 14-7= 60-1= 30-7= 80-3=退位减法口算练习题班级_______________ 姓名__________________52-6= 31-5= 32-7= 12-7= 48-9= 76-8= 64-6= 71-7= 50-2= 65-9= 62-3= 97-9= 90-4= 32-7= 70-4= 40-5= 94-9= 91-5= 66-7= 50-4= 40-1= 72-9= 10-2= 54-7= 60-8= 11-9= 30-8= 53-5= 94-8= 73-8= 21-4= 70-2= 42-7= 33-6= 84-5= 42-8= 33-7= 84-6= 98-9= 57-9= 63-7= 91-5= 31-2= 22-9= 90-6= 71-7= 20-6= 51-2= 10-4= 70-1= 50-6= 86-8= 41-4= 54-7= 34-8= 44-8= 76-8= 37-9= 70-2= 22-9= 12-9= 71-2= 30-5= 23-7= 83-8= 63-5= 72-4= 41-3= 57-8= 52-5= 67-8= 81-7= 71-4= 53-8= 63-5= 20-2= 61-7= 66-9= 13-5= 52-5= 97-8= 40-3= 98-9= 84-8= 66-9= 95-8= 77-9= 52-6= 44-5= 71-9= 62-7= 44-9= 63-7= 97-8= 40-9= 20-9= 52-5= 73-7= 76-7= 63-4= 31-9= 71-2= 37-8= 15-8= 54-7= 75-9= 61-8= 71-4= 74-8= 94-5= 22-7= 25-6= 87-8= 41-7= 43-6= 95-8= 30-5= 70-9= 73-4= 12-6=退位减法口算练习题班级_______________ 姓名__________________11-4= 50-5= 90-8= 87-8= 30-6= 44-5= 93-6= 44-8= 11-9= 90-1= 23-7= 53-6= 82-3= 10-5= 20-2= 30-9= 20-5= 92-9= 61-4= 11-2= 14-6= 73-9= 54-9= 13-7= 41-4= 14-5= 91-5= 62-5= 25-9= 35-9= 51-2= 34-5= 13-4= 13-5= 46-9= 65-8= 74-5= 56-8= 76-8= 52-9= 52-6= 66-7= 71-4= 30-9= 33-9= 45-9= 85-7= 32-7= 53-8= 50-2= 71-5= 17-9= 23-9= 24-9= 62-4= 13-4= 84-6= 22-6= 23-8= 24-8= 35-7= 82-5= 31-6= 73-5= 30-2= 63-6= 15-6= 20-1= 76-9= 70-7= 90-2= 81-5= 55-7= 31-8= 13-9= 80-8= 20-8= 22-7= 95-9= 95-7= 61-6= 30-3= 32-6= 82-5= 32-9= 91-2= 52-4= 12-6= 86-8= 97-9= 17-8= 70-3= 84-7= 81-8= 81-2= 85-7= 20-2= 53-6= 20-7= 30-6= 12-9= 82-6= 76-8= 26-7= 61-4= 80-4= 65-8= 52-9= 41-7= 12-5= 41-7= 63-4= 41-7= 52-4= 66-8= 26-9= 20-8= 61-7= 36-7= 73-6=退位减法口算练习题班级_______________ 姓名__________________82-7= 12-4= 51-9= 44-5= 66-7= 66-9= 46-9= 80-7= 31-2= 42-4= 23-5= 94-7= 41-4= 20-7= 90-5= 44-7= 66-8= 22-6= 91-6= 93-6= 13-6= 10-8= 51-9= 95-6= 92-7= 75-9= 62-4= 95-7= 20-8= 10-4= 13-5= 60-7= 50-1= 22-3= 53-4= 40-8= 24-9= 76-9= 94-9= 95-8= 55-7= 31-7= 63-9= 32-3= 62-7= 83-7= 61-4= 51-9= 45-9= 41-9= 61-2= 25-9= 26-7= 61-8= 54-5= 20-7= 31-3= 71-6= 53-9= 21-6= 63-6= 34-6= 63-6= 13-5= 62-4= 41-3= 80-8= 14-8= 12-6= 70-5= 24-5= 13-9= 91-3= 15-7= 30-4= 86-9= 74-5= 31-3= 51-3= 55-8= 57-9= 21-4= 15-9= 12-7= 14-9= 42-5= 41-7= 45-7= 91-5= 32-7= 60-2= 50-9= 67-8= 25-7= 21-9= 74-6= 91-5= 14-6= 63-4= 31-5= 71-5= 62-9= 52-7= 73-7= 10-5= 20-8= 43-5= 30-9= 91-9= 30-7=退位减法口算练习题班级_______________ 姓名__________________81-7= 42-6= 52-4= 25-8= 50-8= 12-4= 73-6= 76-7= 41-9= 38-9= 81-9= 85-8= 80-5= 72-3= 46-9= 93-6= 42-5= 35-9= 60-9= 38-9= 45-8= 20-2= 11-2= 32-9= 52-4= 46-9= 40-7= 61-8= 13-7= 96-8= 14-8= 81-3= 24-8= 66-7= 64-9= 91-9= 72-4= 67-9= 80-1= 82-3= 22-6= 52-6= 83-8= 96-8= 62-5= 64-7= 21-2= 25-6= 40-4= 82-3= 45-8= 41-5= 72-5= 80-9= 43-4= 97-8= 35-6= 42-8= 40-6= 48-9= 80-8= 66-8= 31-7= 92-8= 41-3= 67-9= 61-7= 50-3= 67-8= 86-7= 41-3= 61-4= 33-4= 12-3= 14-6= 20-9= 73-8= 63-4= 43-8= 38-9= 22-8= 97-9= 23-6= 51-5= 22-4= 41-8= 18-9= 57-8= 47-8= 80-2= 80-7= 83-9= 30-5= 63-8= 72-6= 88-9= 13-8= 63-4= 13-6= 94-6= 76-8= 22-4= 42-8= 46-9= 72-6= 67-9= 47-8= 95-8= 75-7= 51-3= 71-7= 60-6= 13-4= 95-7= 66-7= 10-6= 31-7= 11-7= 20-8= 46-8=退位减法口算练习题班级_______________ 姓名__________________97-9= 12-3= 71-2= 84-8= 12-6= 21-9= 73-8= 81-6= 96-9= 51-9= 16-7= 72-6= 82-3= 52-4= 55-6= 33-8= 80-5= 11-3= 43-4= 90-9= 31-9= 62-5= 10-4= 55-6= 11-3= 70-4= 22-3= 66-8= 44-9= 46-7= 75-7= 83-7= 62-4= 96-7= 40-7= 73-6= 70-8= 41-3= 75-9= 25-7= 84-8= 50-5= 10-6= 11-5= 93-4= 56-8= 90-5= 44-5= 58-9= 46-9= 23-5= 90-4= 80-3= 93-5= 92-5= 93-4= 71-2= 20-6= 61-3= 41-8= 23-6= 57-9= 86-8= 25-9= 90-5= 73-5= 15-9= 81-6= 63-4= 52-5= 72-4= 34-9= 67-9= 74-7= 41-2= 70-7= 22-7= 51-8= 63-9= 82-7= 94-9= 17-9= 38-9= 43-6= 42-5= 63-8= 56-8= 54-5= 77-9= 87-8= 60-3= 51-9= 54-9= 26-7= 52-8= 30-8= 73-8= 20-1= 24-6= 62-8= 90-1= 91-2= 62-8= 95-8= 61-4= 15-7= 40-4= 14-8= 54-5= 36-7= 53-4= 85-8= 41-7= 64-9= 93-8= 71-7= 42-4= 73-4= 54-7= 73-6=退位减法口算练习题班级_______________ 姓名__________________60-6= 81-6= 71-7= 10-8= 92-7= 92-7= 20-2= 52-9= 94-8= 27-8= 40-6= 80-9= 85-8= 91-9= 80-7= 20-4= 64-6= 23-5= 23-7= 42-7= 96-7= 40-5= 90-1= 42-8= 10-3= 80-6= 81-3= 20-5= 50-8= 26-9= 91-9= 62-4= 44-9= 41-9= 54-8= 91-8= 90-2= 41-2= 74-9= 17-8= 62-8= 90-4= 23-4= 43-4= 62-8= 90-3= 50-2= 64-6= 15-9= 33-8= 92-4= 52-4= 21-7= 42-8= 60-3= 25-7= 33-6= 71-5= 82-6= 21-8= 61-3= 11-2= 33-6= 76-7= 52-5= 54-9= 32-3= 52-6= 72-4= 80-5= 21-3= 87-8= 32-7= 60-8= 83-5= 72-6= 92-7= 41-7= 23-6= 65-8= 76-9= 22-4= 41-3= 70-8= 54-8= 74-9= 84-7= 75-6= 97-8= 54-9= 72-5= 14-6= 61-6= 40-7= 22-3= 31-2= 36-7= 40-5= 42-3= 94-6= 30-6= 95-8= 11-2= 31-9= 55-7= 60-1= 42-7= 15-8= 25-9= 20-2= 42-9= 55-7= 81-9= 85-9= 13-4= 13-5= 60-2= 74-8= 92-6= 90-8=退位减法口算练习题班级_______________ 姓名__________________53-7= 75-8= 60-8= 56-9= 46-9= 90-8= 77-8= 43-9= 33-6= 63-7= 81-9= 33-8= 82-6= 24-6= 52-8= 94-7= 52-3= 40-8= 88-9= 92-6= 63-5= 72-6= 28-9= 90-9= 25-7= 35-8= 80-5= 93-9= 36-7= 80-2= 50-3= 15-7= 84-5= 73-6= 52-8= 11-3= 54-5= 73-4= 26-8= 86-7= 95-8= 15-7= 44-6= 11-7= 96-9= 80-5= 82-8= 38-9= 81-6= 23-4= 20-3= 75-8= 50-4= 82-4= 93-6= 76-7= 51-3= 23-6= 22-7= 60-1= 42-5= 85-7= 65-8= 62-4= 42-9= 11-3= 12-4= 81-7= 12-7= 75-8= 80-7= 62-8= 32-6= 50-5= 52-4= 10-1= 68-9= 90-6= 86-8= 35-9= 13-5= 90-2= 34-6= 54-8= 92-9= 53-7= 24-6= 61-2= 90-5= 94-6= 30-5= 45-7= 61-5= 22-3= 80-7= 40-4= 51-2= 62-3= 66-7= 41-4= 43-6= 98-9= 72-4= 33-9= 10-8= 56-7= 90-4= 24-5= 53-4= 73-9= 37-9= 98-9= 70-6= 74-8= 52-8= 70-2= 52-5= 44-9= 12-7= 64-5=退位减法口算练习题班级_______________ 姓名__________________94-5= 70-4= 21-5= 77-8= 36-8= 85-6= 91-6= 83-8= 14-5= 50-4= 85-7= 40-5= 60-1= 82-6= 10-2= 10-7= 12-5= 92-5= 52-4= 86-8= 73-4= 10-6= 32-7= 33-6= 90-8= 11-9= 71-4= 21-6= 83-5= 73-7= 60-9= 82-7= 78-9= 33-6= 90-5= 20-1= 74-5= 72-7= 51-7= 51-2= 64-7= 86-8= 10-4= 22-3= 64-9= 43-8= 66-7= 21-2= 24-8= 92-7= 51-7= 42-7= 76-9= 61-4= 73-8= 28-9= 23-9= 24-7= 21-7= 22-3= 21-4= 10-4= 84-9= 56-7= 61-9= 96-7= 41-7= 91-6= 96-8= 62-4= 61-3= 40-6= 87-8= 84-9= 21-6= 25-7= 80-8= 24-6= 50-7= 70-8= 82-9= 22-3= 31-5= 50-9= 30-4= 13-5= 66-9= 83-5= 61-7= 71-2= 55-9= 64-6= 15-8= 53-5= 35-9= 41-7= 51-7= 72-3= 11-9= 66-7= 82-8= 40-7= 14-8= 64-6= 11-8= 22-3= 73-6= 83-9= 17-8= 23-7= 63-5= 35-9= 14-6= 22-6= 10-8= 67-8= 34-9= 65-7= 71-3= 57-8=退位减法口算练习题班级_______________ 姓名__________________52-3= 10-8= 50-2= 16-8= 51-7= 65-6= 70-3= 13-9= 52-3= 96-7= 62-6= 73-6= 45-6= 11-3= 81-7= 25-8= 35-8= 13-8= 12-5= 51-2= 50-7= 75-8= 70-5= 51-3= 70-7= 42-8= 21-5= 27-8= 82-6= 92-8= 80-3= 35-8= 62-4= 32-7= 20-5= 20-9= 63-4= 61-3= 84-5= 40-4= 62-4= 86-8= 80-3= 93-8= 90-3= 96-8= 42-8= 33-9= 21-2= 10-8= 96-7= 31-8= 97-9= 87-8= 97-9= 70-9= 54-7= 81-9= 45-9= 43-4= 52-6= 52-8= 91-8= 84-8= 14-6= 53-9= 91-2= 46-7= 55-9= 61-6= 10-3= 44-7= 20-3= 50-6= 32-8= 23-5= 80-7= 70-9= 91-8= 50-7= 50-5= 32-7= 20-3= 83-9= 31-3= 82-8= 41-5= 10-7= 60-7= 14-5= 11-5= 42-7= 28-9= 93-8= 42-6= 22-4= 50-2= 41-3= 21-9= 84-8= 11-9= 93-6= 80-3= 33-6= 83-5= 41-7= 25-7= 54-9= 30-9= 74-8= 53-5= 51-3= 21-6= 74-8= 81-7= 52-4= 86-8= 52-9= 11-2= 14-6=退位减法口算练习题班级_______________ 姓名__________________73-5= 65-9= 85-8= 15-9= 70-9= 82-5= 20-1= 22-6= 72-7= 65-6= 42-7= 35-7= 93-4= 13-7= 21-4= 35-7= 20-8= 40-7= 16-8= 42-5= 97-9= 36-7= 27-9= 81-9= 21-2= 82-9= 57-9= 82-5= 41-9= 42-8= 80-3= 80-1= 70-9= 15-6= 77-8= 62-5= 62-4= 70-7= 88-9= 41-8= 40-3= 13-9= 36-9= 85-9= 14-9= 85-7= 63-6= 16-7= 22-9= 95-7= 65-6= 41-6= 15-9= 40-8= 66-8= 44-7= 72-9= 91-9= 52-5= 70-3= 80-6= 72-9= 26-9= 13-8= 40-9= 24-5= 51-2= 81-5= 73-5= 72-4= 53-9= 73-9= 41-2= 96-8= 22-4= 63-5= 67-8= 90-9= 37-9= 13-5= 84-7= 93-6= 95-9= 41-5= 80-1= 95-9= 54-6= 92-9= 22-4= 33-4= 80-8= 91-9= 97-9= 52-4= 27-9= 43-7= 70-9= 61-3= 40-9= 40-8= 61-8= 30-8= 61-3= 34-8= 15-6= 51-4= 61-2= 64-9= 94-6= 32-5= 75-8= 30-9= 74-9= 46-9= 20-6= 41-8= 51-3= 20-6= 43-8= 76-7=退位减法口算练习题班级_______________ 姓名__________________92-8= 10-5= 71-9= 24-8= 98-9= 70-7= 73-8= 54-8= 90-8= 15-7= 32-8= 50-5= 81-9= 91-7= 73-8= 91-8= 81-3= 52-8= 20-1= 54-5= 23-8= 80-1= 71-3= 40-5= 62-6= 21-3= 35-6= 32-8= 40-9= 31-7= 23-4= 26-7= 40-8= 52-9= 40-6= 41-2= 86-8= 32-8= 60-7= 84-6= 41-9= 14-9= 34-5= 52-8= 71-3= 23-6= 74-5= 94-9= 91-7= 81-9= 48-9= 23-6= 72-4= 23-4= 81-3= 10-9= 25-6= 32-4= 75-9= 95-6= 82-8= 61-8= 41-9= 50-1= 14-9= 73-8= 11-6= 52-8= 31-6= 40-5= 41-6= 61-6= 82-5= 23-9= 52-3= 52-5= 56-8= 92-6= 46-8= 67-9= 22-3= 55-6= 51-3= 70-2= 28-9= 26-8= 96-7= 51-9= 90-2= 23-6= 62-8= 95-6= 16-7= 50-6= 31-6= 90-8= 62-5= 10-1= 23-9= 30-5= 75-9= 35-9= 12-8= 60-3= 76-7= 40-2= 31-5= 23-6= 26-7= 41-6= 13-6= 36-9= 12-5= 13-6= 60-6= 76-8= 91-8= 60-1= 50-7= 66-9=退位减法口算练习题班级_______________ 姓名__________________34-8= 35-9= 97-8= 67-9= 41-3= 41-4= 35-8= 24-8= 30-1= 91-8= 76-7= 61-8= 13-5= 85-7= 33-7= 21-5= 80-7= 21-4= 22-9= 30-5= 24-6= 15-9= 75-9= 40-8= 34-5= 94-5= 45-7= 91-4= 20-9= 40-7= 60-3= 84-6= 84-8= 65-6= 57-8= 61-8= 11-6= 20-1= 13-4= 10-1= 71-5= 81-5= 40-1= 63-7= 31-8= 91-9= 12-8= 40-9= 14-8= 76-9= 55-8= 20-9= 25-9= 82-5= 22-6= 90-5= 51-5= 22-6= 50-7= 96-8= 62-4= 12-8= 63-8= 14-7= 23-4= 25-6= 60-8= 65-8= 45-6= 10-1= 24-8= 85-9= 24-5= 82-9= 16-8= 40-5= 52-9= 30-1= 90-2= 72-7= 72-8= 21-2= 84-7= 56-9= 64-5= 87-9= 72-5= 53-6= 57-8= 74-9= 33-5= 95-9= 83-4= 16-7= 11-3= 46-8= 81-5= 11-6= 27-9= 61-9= 91-2= 32-5= 54-7= 32-9= 20-8= 71-3= 71-2= 10-7= 61-3= 90-6= 51-4= 92-7= 11-9= 60-3= 92-3= 85-8= 71-3= 43-4= 31-7= 67-9=退位减法口算练习题班级_______________ 姓名__________________22-6= 90-8= 61-6= 50-4= 95-6= 72-7= 61-4= 71-4= 60-1= 64-8= 54-8= 31-5= 25-7= 60-8= 51-8= 30-1= 21-4= 31-6= 74-5= 91-4= 34-9= 35-8= 50-5= 90-7= 20-9= 23-7= 23-6= 40-9= 92-7= 15-9= 31-5= 70-3= 53-4= 82-9= 97-9= 46-9= 20-3= 67-8= 22-8= 67-9= 63-4= 44-8= 50-1= 94-6= 46-8= 20-4= 15-8= 21-6= 16-9= 84-6= 61-8= 44-6= 70-7= 54-6= 86-8= 28-9= 90-2= 60-3= 30-3= 77-9= 30-2= 21-7= 30-1= 50-7= 70-3= 81-3= 70-6= 62-8= 90-6= 12-8= 91-5= 30-1= 24-5= 41-2= 62-5= 84-8= 60-6= 50-3= 41-2= 32-7= 40-8= 55-9= 55-8= 42-7= 86-7= 60-1= 61-7= 73-4= 11-4= 55-9= 74-7= 42-8= 58-9= 84-5= 55-6= 61-9= 91-7= 61-8= 52-5= 72-9= 70-1= 63-7= 17-9= 41-2= 14-9= 36-9= 68-9= 45-9= 82-7= 53-8= 40-3= 34-8= 90-4= 83-5= 55-8= 44-5= 82-4= 82-6= 41-3= 24-6=退位减法口算练习题班级_______________ 姓名__________________11-4= 43-5= 50-4= 61-5= 53-4= 17-9= 14-5= 80-8= 43-8= 37-9= 76-7= 91-3= 41-2= 14-6= 20-5= 95-7= 33-9= 55-9= 81-6= 90-9= 36-7= 60-4= 82-4= 47-9= 46-7= 70-4= 82-9= 27-9= 42-9= 55-9= 12-7= 42-9= 11-7= 57-8= 74-6= 10-2= 62-7= 80-7= 90-4= 30-7= 64-6= 84-7= 51-2= 21-7= 65-9= 32-5= 11-6= 22-8= 44-7= 14-5= 82-4= 62-6= 45-8= 76-7= 21-5= 12-8= 90-9= 51-9= 70-5= 32-6= 50-7= 75-6= 35-8= 80-7= 22-8= 74-6= 57-8= 36-9= 91-4= 75-7= 95-7= 14-7= 55-7= 20-2= 93-9= 92-4= 14-7= 20-4= 51-9= 10-7= 96-7= 71-9= 57-8= 40-1= 84-9= 37-8= 13-4= 20-7= 80-9= 10-5= 50-4= 95-9= 53-8= 81-2= 80-6= 92-6= 65-7= 71-4= 27-9= 70-2= 83-4= 13-7= 23-6= 34-6= 94-6= 30-5= 21-4= 40-3= 72-4= 85-6= 70-3= 61-9= 12-8= 50-4= 35-9= 82-8= 15-8= 11-8= 66-8= 92-3=。