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# 两位数减一位数 （退位） - PowerPoint PPT Presentation

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## 两位数减一位数 （退位）

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Presentation Transcript

（退位）

100以内的加法和减法（一）

57－4＝

53

75－3＝

72

69－5＝

64

57－40＝

17

75－30＝

45

69－50＝

19

36－8＝

6减8不够减

36－8＝

28

36－8＝

28

26

10

20

16

8

2

12

20

14

30

7

5

5

9

27

35

7

5

27

35

72

68

76－4＝

57－3＝

64－3＝

76－8＝

57－9＝

64－8＝

54

48

61

56

6减8不够减，先

73－

3

2

5

9

3

4

0

46－8

34－5

54－3

54－8

1

8

2

5

6

2

1

7

3

6

0

7

8

5

4

9

4

7

6

6

9

1

8

22

7

15

（只）