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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 572 · 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. 1.9 × 49 =
  2. 2.4 × 29 =
  3. 3.6 × 19 =
  4. 4.8 × 9 =
  5. 5.38 × 98 =
  6. 6.11 × 19 =
  7. 7.8 × 49 =
  8. 8.3 × 29 =
  9. 9.15 × 49 =
  10. 10.5 × 9 =
  11. 11.3 × 9 =
  12. 12.34 × 99 =
  13. 13.9 × 29 =
  14. 14.6 × 49 =
  15. 15.9 × 19 =
  16. 16.5 × 98 =
  17. 17.10 × 29 =
  18. 18.7 × 19 =
  19. 19.8 × 19 =
  20. 20.5 × 9 =
  21. 21.9 × 29 =
  22. 22.23 × 98 =
  23. 23.9 × 49 =
  24. 24.9 × 19 =
  25. 25.6 × 19 =
  26. 26.14 × 19 =
  27. 27.37 × 99 =
  28. 28.17 × 99 =
  29. 29.14 × 19 =
  30. 30.4 × 49 =
  31. 31.3 × 19 =
  32. 32.3 × 29 =
  33. 33.11 × 19 =
  34. 34.7 × 29 =
  35. 35.8 × 49 =
  36. 36.7 × 9 =
  37. 37.34 × 99 =
  38. 38.3 × 9 =
  39. 39.13 × 49 =
  40. 40.21 × 99 =

Answer key

  1. 441
  2. 116
  3. 114
  4. 72
  5. 3724
  6. 209
  7. 392
  8. 87
  9. 735
  10. 45
  11. 27
  12. 3366
  13. 261
  14. 294
  15. 171
  16. 490
  17. 290
  18. 133
  19. 152
  20. 45
  21. 261
  22. 2254
  23. 441
  24. 171
  25. 114
  26. 266
  27. 3663
  28. 1683
  29. 266
  30. 196
  31. 57
  32. 87
  33. 209
  34. 203
  35. 392
  36. 63
  37. 3366
  38. 27
  39. 637
  40. 2079

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