一、口算。
210 - 40 = 110 - 90 = 880 - 320 =
430 + 200 = 220 + 110 = 300 + 610 =
63 - 54 = 850 - 80 = 180 - 20 =
120 + 780 = 740 + 60 = 930 - 50 =
560 + 130 = 710 - 440 = 830 - 90 =
220 - 90 = 110 + 370 = 18 + 49 =
24 + 36 = 820 - 50 = 1200 - 700 =
750 - 80 = 39 + 25 = 53 - 18 =
210 - 40 = 110 - 90 = 880 - 320 =
430 + 200 = 220 + 110 = 300 + 610 =
63 - 54 = 850 - 80 = 180 - 20 =
120 + 780 = 740 + 60 = 930 - 50 =
560 + 130 = 710 - 440 = 830 - 90 =
220 - 90 = 110 + 370 = 18 + 49 =
24 + 36 = 820 - 50 = 1200 - 700 =
750 - 80 = 39 + 25 = 53 - 18 =
答案
170 20 560
630 330 910
9 770 160
900 800 880
690 270 740
130 480 67
60 770 500
670 64 35
630 330 910
9 770 160
900 800 880
690 270 740
130 480 67
60 770 500
670 64 35
二、用竖式计算,带 * 的要验算。

答案
解:
1. $526 - 339 = 187$
526
- 339
-----
187
2. $337 + 89 = 426$
337
+ 89
-----
426
3. $707 - 528 = 179$
707
- 528
-----
179
验算:
179
+ 528
-----
707
4. $269 + 534 = 803$
269
+ 534
-----
803
5. $315 - 76 = 239$
315
- 76
-----
239
6. $436 + 376 = 812$
436
+ 376
-----
812
验算:
812
- 376
-----
436
1. $526 - 339 = 187$
526
- 339
-----
187
2. $337 + 89 = 426$
337
+ 89
-----
426
3. $707 - 528 = 179$
707
- 528
-----
179
验算:
179
+ 528
-----
707
4. $269 + 534 = 803$
269
+ 534
-----
803
5. $315 - 76 = 239$
315
- 76
-----
239
6. $436 + 376 = 812$
436
+ 376
-----
812
验算:
812
- 376
-----
436
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