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1. What is +339 added to the sum of -458 and 1177? 2. If +598 increased by -873 plus +429 is equal to N, what is N? 3. What is -892 more than the sum of -397 and +900? 4. What is +7 002 + -5 209 more than +11 807? 5. What is -8 006 more than the sum of +6 798 plus 9 283? 6. If -7 394 plus -9 002 increased by +6 882 is N, what is N? 7. If-689 diminished by +532 is N, what is N? What is +7 362 plus -4 738 minus +9 300? 9. What is -8 034 more than the difference of -2 405 and +973? 8.​