100以内带进位的加减法

100以内进退位加减法口算练习

加法

进位加法

在进行进位加法时，要将个位数对齐，从低位开始逐位相加。当个位数相加超过10时，要将进位的1加到十位上，最后得出的数就是所求的和。

例题：34 + 28 = ?

解：先将个位数4和8相加，得到2，进位1。再将十位数3、2以及进位的1相加，得到6。所以，34 + 28 = 62。

退位加法

在进行退位加法时，要将个位数对齐，从低位开始逐位相加。当个位数相加小于0时，则向前一位借1，并将被减数的个位数加上10。最后得出的数就是所求的和。

例题：58 + 17 = ?

解：先将个位数8和7相加，得到15。由于个位数相加大于10，所以要向前一位进1。然后将十位数5、1以及进位的1相加，得到7。所以，58 + 17 = 75。

减法

不退位减法

在进行不退位减法时，要将个位数对齐，从低位开始逐位相减。当被减数的个位数小于减数的个位数时，要向前一位借1。最后得出的数就是所求的差。

例题：56 - 23 = ?

解：先将个位数6和3相减，得到3。由于56的十位数大于23的十位数，所以直接将十位数相减，得到3。所以，56 - 23 = 33。

退位减法

在进行退位减法时，要将个位数对齐，从低位开始逐位相减。当被减数的个位数小于减数的个位数时，则向前一位借1，并将个位数加上10，再进行减法。最后得出的数就是所求的差。

例题：73 - 48 = ?

解：先将个位数3和8相减，不够减，要向前一位借1，并将个位数加上10，变成13。再将十位数7和4相减，得到3。所以，73 - 48 = 25。

以上就是100以内进退位加减法口算的练习，通过反复练习，相信大家都能够掌握这些口算技巧，并提高口算水平。

题目

17 + 13 = 30 90 - 19 = 71 3 + 28 = 31

27 + 37 = 64 98 - 11 = 87 49 + 18 = 67

4 + 11 = 15 98 - 50 = 48 50 + 7 = 57

11 + 50 = 61 93 - 47 = 46 47 + 25 = 72

17 + 37 = 54 62 - 26 = 36 8 + 2 = 10

24 + 9 = 33 66 - 41 = 25 9 + 20 = 29

43 + 5 = 48 77 - 35 = 42 17 + 6 = 23

34 + 8 = 42 67 - 22 = 45 40 + 17 = 57

8 + 12 = 20 60 - 10 = 50 8 + 5 = 13

49 + 40 = 89 84 - 46 = 38 13 + 50 = 63

15 8 = 23 71 - 46 = 25 14 + 1 = 15

14 + 27 = 41 95 - 27 = 68 33 + 19 = 52

47 + 7 = 54 76 - 41 = 35 23 + 22 = 45

21 + 6 = 27 98 - 14 = 84 17 + 14 = 31

5 + 23 = 28 86 - 5 = 81 2 + 3 = 5

33 + 22 = 55 98 - 20 = 78 45 + 46 = 91

16 + 30 = 46 76 - 50 = 26 2 + 30 = 32

5 + 22 = 27 74 - 42 = 32 19 + 40 = 59

41 + 49 = 90 95 - 34 = 61 14 + 9 = 23

13 + 49 = 62 67 - 22 = 45 7 + 47 = 54 2 + 43 = 45 64 - 1 = 63 28 + 20 = 48

10 + 33 = 43 96 - 31 = 65 1 + 8 = 9

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