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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 465 · 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. 1.8 × 9 =
  2. 2.24 × 98 =
  3. 3.38 × 98 =
  4. 4.5 × 29 =
  5. 5.5 × 49 =
  6. 6.7 × 19 =
  7. 7.7 × 49 =
  8. 8.15 × 49 =
  9. 9.7 × 9 =
  10. 10.8 × 29 =
  11. 11.6 × 49 =
  12. 12.32 × 99 =
  13. 13.11 × 98 =
  14. 14.6 × 49 =
  15. 15.6 × 9 =
  16. 16.3 × 98 =
  17. 17.6 × 19 =
  18. 18.13 × 19 =
  19. 19.9 × 9 =
  20. 20.4 × 99 =
  21. 21.5 × 29 =
  22. 22.3 × 19 =
  23. 23.29 × 99 =
  24. 24.5 × 19 =
  25. 25.7 × 29 =
  26. 26.14 × 99 =
  27. 27.11 × 19 =
  28. 28.13 × 49 =
  29. 29.12 × 19 =
  30. 30.25 × 99 =
  31. 31.5 × 19 =
  32. 32.20 × 99 =
  33. 33.4 × 19 =
  34. 34.14 × 19 =
  35. 35.8 × 9 =
  36. 36.13 × 99 =
  37. 37.10 × 29 =
  38. 38.5 × 9 =
  39. 39.15 × 19 =
  40. 40.14 × 19 =

Answer key

  1. 72
  2. 2352
  3. 3724
  4. 145
  5. 245
  6. 133
  7. 343
  8. 735
  9. 63
  10. 232
  11. 294
  12. 3168
  13. 1078
  14. 294
  15. 54
  16. 294
  17. 114
  18. 247
  19. 81
  20. 396
  21. 145
  22. 57
  23. 2871
  24. 95
  25. 203
  26. 1386
  27. 209
  28. 637
  29. 228
  30. 2475
  31. 95
  32. 1980
  33. 76
  34. 266
  35. 72
  36. 1287
  37. 290
  38. 45
  39. 285
  40. 266

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