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1．口算练习

3 8. 2 5. +. 1．口算练习. 120. 330. 50＋70＝ 30＋600＝ 30＋300＝ 90＋20＝ 40＋50＝ 0＋500＝. 630. 110. 500. 90. 2．求38加25的和. 笔算两位数加法：. ①相同数位对齐；. ②从个位加起；. 6. 3. ③个位满十，向十位进1．. 求1738加上625的和. 1738 ＋ 625 =. 求下面两个数的和. 43+32=. 4 3. 4 3. 3 2. +. 7. 5. 3 2.

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1．口算练习

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  1. 3 8 2 5 + 1．口算练习 120 330 50＋70＝ 30＋600＝ 30＋300＝ 90＋20＝ 40＋50＝ 0＋500＝ 630 110 500 90 2．求38加25的和 笔算两位数加法： ①相同数位对齐； ②从个位加起； 6 3 ③个位满十，向十位进1．

  2. 求1738加上625的和 1738 ＋ 625 =

  3. 求下面两个数的和 43+32= 4 3 4 3 3 2 + 7 5 3 2

  4. 例1 求下面两个数的和 2 4 3 2 4 3 1 3 2 + 7 5 1 3 2

  5. 例2 270 ＋ 58 = 2 7 0 + 5 8 8

  6. 例2 270 ＋ 58 = 2 7 0 + 5 8 1 3 2 8

  7. 例3 求809与3764的和． 809 + 3764 = 4573 8 0 9 + 3 7 6 4 1 1 4 5 7 3

  8. 巩固反馈 1．直接在竖式上计算 2．列竖式计算 238＋326= 1629＋527= 715＋8605=

  9. 巩固反馈 3．判断正误并改正．

  10. 1738 ＋ 625 =

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