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Kani
Cosmic Abacus
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Sheet #1000. The same settings and number always produce the same sheet, so you can reprint an identical paper — or press New sheet for fresh problems at the same difficulty.

Preview25 problems · 5 rows · 2 digits
  1. 181+ 84− 89− 48+ 19
  2. 273− 67+ 86− 60− 30
  3. 361+ 42− 37− 23+ 83
  4. 473+ 51+ 46− 76+ 41
  5. 543− 29+ 12+ 73− 72
  6. 683+ 15+ 86+ 33+ 26
  7. 768− 64+ 84− 14+ 66
  8. 871− 48+ 45− 21+ 32
  9. 912+ 35+ 90+ 18− 39
  10. 1021− 19+ 24+ 99+ 16
  11. 1192+ 73+ 26+ 51+ 45
  12. 1250+ 93+ 85− 17− 99