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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 376 · 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. 1.18 × 99 =
  2. 2.4 × 9 =
  3. 3.11 × 49 =
  4. 4.12 × 19 =
  5. 5.14 × 99 =
  6. 6.5 × 49 =
  7. 7.11 × 19 =
  8. 8.36 × 99 =
  9. 9.4 × 9 =
  10. 10.15 × 49 =
  11. 11.7 × 29 =
  12. 12.7 × 99 =
  13. 13.25 × 98 =
  14. 14.7 × 19 =
  15. 15.11 × 19 =
  16. 16.6 × 49 =
  17. 17.17 × 98 =
  18. 18.5 × 9 =
  19. 19.7 × 99 =
  20. 20.14 × 29 =
  21. 21.15 × 9 =
  22. 22.9 × 9 =
  23. 23.9 × 19 =
  24. 24.4 × 49 =
  25. 25.11 × 19 =
  26. 26.3 × 29 =
  27. 27.11 × 19 =
  28. 28.15 × 19 =
  29. 29.11 × 29 =
  30. 30.7 × 49 =
  31. 31.11 × 19 =
  32. 32.15 × 19 =
  33. 33.3 × 19 =
  34. 34.5 × 29 =
  35. 35.10 × 9 =
  36. 36.23 × 99 =
  37. 37.10 × 19 =
  38. 38.12 × 9 =
  39. 39.11 × 49 =
  40. 40.6 × 49 =

Answer key

  1. 1782
  2. 36
  3. 539
  4. 228
  5. 1386
  6. 245
  7. 209
  8. 3564
  9. 36
  10. 735
  11. 203
  12. 693
  13. 2450
  14. 133
  15. 209
  16. 294
  17. 1666
  18. 45
  19. 693
  20. 406
  21. 135
  22. 81
  23. 171
  24. 196
  25. 209
  26. 87
  27. 209
  28. 285
  29. 319
  30. 343
  31. 209
  32. 285
  33. 57
  34. 145
  35. 90
  36. 2277
  37. 190
  38. 108
  39. 539
  40. 294

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