小学100以内加减法

小学100以内加减法

对于小学100以内的加减法,这里有一些基础练习和口诀帮助你掌握:

加法口诀(不进位)

```

6 + 4 = 10

3 + 11 = 14

7 + 1 = 8

8 + 11 = 19

16 + 1 = 17

4 + 12 = 16

12 + 2 = 14

3 + 12 = 15

12 + 6 = 18

3 + 16 = 19

4 + 4 = 8

8 + 2 = 10

8 - 5 = 3

6 + 1 = 7

10 - 10 = 0

8 - 6 = 2

10 - 4 = 6

1 + 9 = 10

9 - 9 = 0

5 - 4 = 1

6 + 1 = 7

9 - 1 = 8

14 - 3 = 11

```

减法口诀(不退位)

```

39 + 35 - 40 = 34

32 - 23 + 56 = 65

17 + 48 - 37 = 28

26 + 23 + 11 = 60

12 + 15 + 19 = 46

69 - 32 - 17 = 20

57 + 23 - 62 = 18

57 + 23 - 48 = 32

57 + 23 - 72 = 9

72 - 57 + 18 = 33

72 - 57 + 48 = 63

72 - 48 + 18 = 42

100 - 28 + 35 = 107

23 + 47 - 28 = 42

28 + 24 - 16 = 36

```

进位加法口诀

```

加9要减1

加8要减2

加7要减3

加6要减4

加5要减5

加4要减6

加3要减7

加2要减8

加1要减9

```

不退位减法口诀

```

减9要加1

减8要加2

减7要加3

减6要加4

减5要加5

减4要加6

减3要加7

减2要加8

减1要加9

```

练习题目

```

39 + 35 - 40 = 34

32 - 23 + 56 = 65

17 + 48 - 37 = 28

26 + 23 + 11 = 60

12 + 15 + 19 = 46

69 - 32 - 17 = 20

57 + 23 - 62 = 18

57 + 23 - 48 = 32

57 + 23 - 72 = 9

72 - 57 + 18 = 33

72 - 57 + 48 = 63

72 - 48 + 18 = 42

100 - 28 + 35 = 107

23 + 47 - 28 = 42

28 + 24 - 16 = 36

```

通过这些口诀和练习题目,你可以更好地掌握100以内的加减法。