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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 450 · 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 × 29 =
  2. 2.21 × 98 =
  3. 3.14 × 9 =
  4. 4.4 × 9 =
  5. 5.12 × 9 =
  6. 6.12 × 19 =
  7. 7.4 × 19 =
  8. 8.27 × 99 =
  9. 9.9 × 19 =
  10. 10.4 × 19 =
  11. 11.11 × 19 =
  12. 12.10 × 9 =
  13. 13.4 × 29 =
  14. 14.10 × 9 =
  15. 15.13 × 19 =
  16. 16.13 × 99 =
  17. 17.13 × 49 =
  18. 18.4 × 99 =
  19. 19.5 × 49 =
  20. 20.12 × 29 =
  21. 21.8 × 29 =
  22. 22.31 × 98 =
  23. 23.12 × 99 =
  24. 24.15 × 99 =
  25. 25.40 × 99 =
  26. 26.11 × 19 =
  27. 27.6 × 19 =
  28. 28.40 × 98 =
  29. 29.9 × 99 =
  30. 30.11 × 98 =
  31. 31.4 × 19 =
  32. 32.13 × 9 =
  33. 33.4 × 19 =
  34. 34.4 × 9 =
  35. 35.14 × 9 =
  36. 36.34 × 98 =
  37. 37.9 × 98 =
  38. 38.5 × 49 =
  39. 39.12 × 19 =
  40. 40.6 × 9 =

Answer key

  1. 87
  2. 2058
  3. 126
  4. 36
  5. 108
  6. 228
  7. 76
  8. 2673
  9. 171
  10. 76
  11. 209
  12. 90
  13. 116
  14. 90
  15. 247
  16. 1287
  17. 637
  18. 396
  19. 245
  20. 348
  21. 232
  22. 3038
  23. 1188
  24. 1485
  25. 3960
  26. 209
  27. 114
  28. 3920
  29. 891
  30. 1078
  31. 76
  32. 117
  33. 76
  34. 36
  35. 126
  36. 3332
  37. 882
  38. 245
  39. 228
  40. 54

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