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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 204 · 40 questions
TalentJR

How it works (Round and adjust): Round up: 49 is 50 − 1, 98 is 100 − 2. Multiply by the round number. Take away the number times the bit you added.

NameDateTime takenScore ___ / 40
  1. 1.10 × 99 =
  2. 2.12 × 9 =
  3. 3.12 × 29 =
  4. 4.35 × 99 =
  5. 5.34 × 99 =
  6. 6.11 × 9 =
  7. 7.37 × 98 =
  8. 8.13 × 9 =
  9. 9.5 × 29 =
  10. 10.16 × 98 =
  11. 11.12 × 19 =
  12. 12.5 × 9 =
  13. 13.13 × 98 =
  14. 14.10 × 19 =
  15. 15.27 × 98 =
  16. 16.10 × 19 =
  17. 17.3 × 9 =
  18. 18.32 × 99 =
  19. 19.13 × 29 =
  20. 20.10 × 19 =
  21. 21.11 × 19 =
  22. 22.4 × 9 =
  23. 23.13 × 29 =
  24. 24.12 × 98 =
  25. 25.13 × 49 =
  26. 26.35 × 98 =
  27. 27.7 × 9 =
  28. 28.26 × 99 =
  29. 29.7 × 19 =
  30. 30.7 × 99 =
  31. 31.5 × 19 =
  32. 32.4 × 19 =
  33. 33.15 × 49 =
  34. 34.5 × 49 =
  35. 35.5 × 19 =
  36. 36.12 × 98 =
  37. 37.14 × 99 =
  38. 38.15 × 19 =
  39. 39.3 × 9 =
  40. 40.15 × 49 =

Answer key

  1. 990
  2. 108
  3. 348
  4. 3465
  5. 3366
  6. 99
  7. 3626
  8. 117
  9. 145
  10. 1568
  11. 228
  12. 45
  13. 1274
  14. 190
  15. 2646
  16. 190
  17. 27
  18. 3168
  19. 377
  20. 190
  21. 209
  22. 36
  23. 377
  24. 1176
  25. 637
  26. 3430
  27. 63
  28. 2574
  29. 133
  30. 693
  31. 95
  32. 76
  33. 735
  34. 245
  35. 95
  36. 1176
  37. 1386
  38. 285
  39. 27
  40. 735

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