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Phép cộng, trừ trong phạm vi 1000
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200+500
700
Oops!
Okay!
651 + 9
660
Oops!
Okay!
645+232
877
Oops!
Okay!
952 - 732
220
Oops!
Okay!
912+36
948
Oops!
Okay!
977 - 128
849
Oops!
Okay!
345+137
482
Oops!
Okay!
123+345
468
Oops!
Okay!
430+40
470
Oops!
Okay!
612 - 412
200
Oops!
Okay!
813 - 212
601
Oops!
Okay!
547+122
669
Oops!
Okay!
444 - 129
315
Oops!
Okay!
513 - 261
252
Oops!
Okay!
779 - 143
636
Oops!
Okay!
654 - 322
332
Oops!
Okay!
222 + 555
777
Oops!
Okay!
236+137
373
Oops!
Okay!
1000-500
500
Oops!
Okay!
376 - 34
342
Oops!
Okay!
673+91
764
Oops!
Okay!
873 - 462
411
Oops!
Okay!
321 + 34
355
Oops!
Okay!
713 - 213
500
Oops!
Okay!
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