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QR Challenge: Adding and Subtraction 3 digit numbers

QuestionAnswer
242- 160 402
208- 88120
168-7395
194-11272
184-65119
105- 3273
274- 159115
279-165114
186-14145
372-154218
253+ 128381
268+ 120388
189+ 42231
136+ 72208
152+43195
179+165344
298+ 282480
246+318564
361+274635
263+128391

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