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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 474 · 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. 1.15 × 19 =
  2. 2.5 × 29 =
  3. 3.26 × 99 =
  4. 4.23 × 98 =
  5. 5.11 × 29 =
  6. 6.11 × 19 =
  7. 7.9 × 99 =
  8. 8.6 × 98 =
  9. 9.14 × 9 =
  10. 10.8 × 9 =
  11. 11.13 × 19 =
  12. 12.11 × 19 =
  13. 13.39 × 98 =
  14. 14.5 × 49 =
  15. 15.25 × 99 =
  16. 16.6 × 19 =
  17. 17.9 × 98 =
  18. 18.9 × 29 =
  19. 19.13 × 99 =
  20. 20.11 × 19 =
  21. 21.11 × 9 =
  22. 22.25 × 99 =
  23. 23.7 × 9 =
  24. 24.7 × 99 =
  25. 25.7 × 98 =
  26. 26.4 × 19 =
  27. 27.4 × 9 =
  28. 28.5 × 49 =
  29. 29.19 × 98 =
  30. 30.14 × 19 =
  31. 31.6 × 9 =
  32. 32.10 × 29 =
  33. 33.29 × 98 =
  34. 34.35 × 98 =
  35. 35.4 × 29 =
  36. 36.4 × 29 =
  37. 37.4 × 9 =
  38. 38.3 × 29 =
  39. 39.7 × 19 =
  40. 40.8 × 29 =

Answer key

  1. 285
  2. 145
  3. 2574
  4. 2254
  5. 319
  6. 209
  7. 891
  8. 588
  9. 126
  10. 72
  11. 247
  12. 209
  13. 3822
  14. 245
  15. 2475
  16. 114
  17. 882
  18. 261
  19. 1287
  20. 209
  21. 99
  22. 2475
  23. 63
  24. 693
  25. 686
  26. 76
  27. 36
  28. 245
  29. 1862
  30. 266
  31. 54
  32. 290
  33. 2842
  34. 3430
  35. 116
  36. 116
  37. 36
  38. 87
  39. 133
  40. 232

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