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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 229 · 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. 1.12 × 19 =
  2. 2.4 × 19 =
  3. 3.18 × 99 =
  4. 4.24 × 98 =
  5. 5.9 × 98 =
  6. 6.10 × 19 =
  7. 7.8 × 99 =
  8. 8.25 × 99 =
  9. 9.4 × 49 =
  10. 10.29 × 98 =
  11. 11.4 × 9 =
  12. 12.12 × 49 =
  13. 13.11 × 29 =
  14. 14.11 × 9 =
  15. 15.15 × 19 =
  16. 16.5 × 19 =
  17. 17.5 × 49 =
  18. 18.5 × 19 =
  19. 19.21 × 98 =
  20. 20.4 × 49 =
  21. 21.7 × 9 =
  22. 22.24 × 98 =
  23. 23.36 × 99 =
  24. 24.12 × 29 =
  25. 25.14 × 19 =
  26. 26.11 × 99 =
  27. 27.11 × 9 =
  28. 28.8 × 9 =
  29. 29.11 × 49 =
  30. 30.19 × 98 =
  31. 31.3 × 49 =
  32. 32.11 × 49 =
  33. 33.17 × 98 =
  34. 34.8 × 49 =
  35. 35.11 × 9 =
  36. 36.5 × 19 =
  37. 37.6 × 19 =
  38. 38.18 × 99 =
  39. 39.10 × 49 =
  40. 40.6 × 9 =

Answer key

  1. 228
  2. 76
  3. 1782
  4. 2352
  5. 882
  6. 190
  7. 792
  8. 2475
  9. 196
  10. 2842
  11. 36
  12. 588
  13. 319
  14. 99
  15. 285
  16. 95
  17. 245
  18. 95
  19. 2058
  20. 196
  21. 63
  22. 2352
  23. 3564
  24. 348
  25. 266
  26. 1089
  27. 99
  28. 72
  29. 539
  30. 1862
  31. 147
  32. 539
  33. 1666
  34. 392
  35. 99
  36. 95
  37. 114
  38. 1782
  39. 490
  40. 54

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