Answer:
5. 868
6. 1,446
7. 445
8. 1,449
Explanation:
5. 417
+ 307
724
+ 144
868
6. 307
+ 997
1,304
+ 142
1,446
7. 940
+ 477
1,417
- 972
445
8. 997
+ 308
1,449.
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