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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 693 · 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. 1.28 × 99 =
  2. 2.14 × 99 =
  3. 3.4 × 29 =
  4. 4.4 × 29 =
  5. 5.4 × 49 =
  6. 6.14 × 9 =
  7. 7.13 × 9 =
  8. 8.11 × 49 =
  9. 9.28 × 98 =
  10. 10.6 × 19 =
  11. 11.12 × 99 =
  12. 12.9 × 49 =
  13. 13.19 × 98 =
  14. 14.15 × 19 =
  15. 15.11 × 49 =
  16. 16.4 × 29 =
  17. 17.32 × 98 =
  18. 18.7 × 9 =
  19. 19.9 × 29 =
  20. 20.7 × 29 =
  21. 21.3 × 9 =
  22. 22.10 × 49 =
  23. 23.16 × 99 =
  24. 24.3 × 29 =
  25. 25.5 × 29 =
  26. 26.32 × 99 =
  27. 27.9 × 9 =
  28. 28.8 × 49 =
  29. 29.12 × 19 =
  30. 30.13 × 9 =
  31. 31.13 × 49 =
  32. 32.14 × 9 =
  33. 33.5 × 29 =
  34. 34.12 × 29 =
  35. 35.15 × 19 =
  36. 36.4 × 19 =
  37. 37.11 × 9 =
  38. 38.8 × 9 =
  39. 39.12 × 9 =
  40. 40.12 × 19 =

Answer key

  1. 2772
  2. 1386
  3. 116
  4. 116
  5. 196
  6. 126
  7. 117
  8. 539
  9. 2744
  10. 114
  11. 1188
  12. 441
  13. 1862
  14. 285
  15. 539
  16. 116
  17. 3136
  18. 63
  19. 261
  20. 203
  21. 27
  22. 490
  23. 1584
  24. 87
  25. 145
  26. 3168
  27. 81
  28. 392
  29. 228
  30. 117
  31. 637
  32. 126
  33. 145
  34. 348
  35. 285
  36. 76
  37. 99
  38. 72
  39. 108
  40. 228

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