September 2021 1 11 Report
1) -17 + 801; 2) +327 + (-327); 3) (-987) + (+1058); 4) (+3296) + (-18536); 5) -74 + (-74); 6) 445 + (-7555); 7) (-918) + 13; 8) +316 + (+84); 9) -8687 + (-75); 10) (+334) + 56; 11) 498 + (-098); 12) (-137) + 0.
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