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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 389 · 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. 1.3 × 9 =
  2. 2.5 × 29 =
  3. 3.8 × 9 =
  4. 4.11 × 98 =
  5. 5.4 × 19 =
  6. 6.8 × 49 =
  7. 7.11 × 19 =
  8. 8.10 × 19 =
  9. 9.15 × 99 =
  10. 10.10 × 49 =
  11. 11.38 × 99 =
  12. 12.3 × 29 =
  13. 13.5 × 49 =
  14. 14.11 × 19 =
  15. 15.13 × 9 =
  16. 16.12 × 29 =
  17. 17.24 × 98 =
  18. 18.11 × 19 =
  19. 19.12 × 29 =
  20. 20.12 × 19 =
  21. 21.12 × 99 =
  22. 22.4 × 9 =
  23. 23.13 × 99 =
  24. 24.35 × 98 =
  25. 25.11 × 29 =
  26. 26.7 × 19 =
  27. 27.5 × 29 =
  28. 28.5 × 9 =
  29. 29.8 × 29 =
  30. 30.26 × 98 =
  31. 31.14 × 29 =
  32. 32.13 × 19 =
  33. 33.3 × 29 =
  34. 34.14 × 49 =
  35. 35.6 × 9 =
  36. 36.9 × 9 =
  37. 37.9 × 49 =
  38. 38.5 × 9 =
  39. 39.6 × 98 =
  40. 40.17 × 98 =

Answer key

  1. 27
  2. 145
  3. 72
  4. 1078
  5. 76
  6. 392
  7. 209
  8. 190
  9. 1485
  10. 490
  11. 3762
  12. 87
  13. 245
  14. 209
  15. 117
  16. 348
  17. 2352
  18. 209
  19. 348
  20. 228
  21. 1188
  22. 36
  23. 1287
  24. 3430
  25. 319
  26. 133
  27. 145
  28. 45
  29. 232
  30. 2548
  31. 406
  32. 247
  33. 87
  34. 686
  35. 54
  36. 81
  37. 441
  38. 45
  39. 588
  40. 1666

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