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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 462 · 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. 1.23 × 99 =
  2. 2.10 × 9 =
  3. 3.4 × 29 =
  4. 4.3 × 9 =
  5. 5.27 × 98 =
  6. 6.5 × 29 =
  7. 7.6 × 19 =
  8. 8.26 × 98 =
  9. 9.9 × 49 =
  10. 10.13 × 9 =
  11. 11.7 × 29 =
  12. 12.28 × 99 =
  13. 13.3 × 19 =
  14. 14.36 × 98 =
  15. 15.15 × 9 =
  16. 16.5 × 49 =
  17. 17.5 × 19 =
  18. 18.4 × 29 =
  19. 19.8 × 29 =
  20. 20.19 × 99 =
  21. 21.9 × 9 =
  22. 22.39 × 98 =
  23. 23.12 × 98 =
  24. 24.12 × 19 =
  25. 25.9 × 9 =
  26. 26.15 × 9 =
  27. 27.34 × 98 =
  28. 28.5 × 98 =
  29. 29.11 × 29 =
  30. 30.16 × 99 =
  31. 31.5 × 29 =
  32. 32.7 × 9 =
  33. 33.8 × 19 =
  34. 34.12 × 9 =
  35. 35.4 × 29 =
  36. 36.28 × 99 =
  37. 37.10 × 19 =
  38. 38.10 × 9 =
  39. 39.17 × 99 =
  40. 40.6 × 29 =

Answer key

  1. 2277
  2. 90
  3. 116
  4. 27
  5. 2646
  6. 145
  7. 114
  8. 2548
  9. 441
  10. 117
  11. 203
  12. 2772
  13. 57
  14. 3528
  15. 135
  16. 245
  17. 95
  18. 116
  19. 232
  20. 1881
  21. 81
  22. 3822
  23. 1176
  24. 228
  25. 81
  26. 135
  27. 3332
  28. 490
  29. 319
  30. 1584
  31. 145
  32. 63
  33. 152
  34. 108
  35. 116
  36. 2772
  37. 190
  38. 90
  39. 1683
  40. 174

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