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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 537 · 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. 1.5 × 9 =
  2. 2.38 × 99 =
  3. 3.12 × 19 =
  4. 4.6 × 99 =
  5. 5.7 × 49 =
  6. 6.9 × 98 =
  7. 7.3 × 98 =
  8. 8.12 × 19 =
  9. 9.4 × 49 =
  10. 10.5 × 29 =
  11. 11.5 × 98 =
  12. 12.10 × 19 =
  13. 13.34 × 98 =
  14. 14.3 × 49 =
  15. 15.6 × 9 =
  16. 16.35 × 99 =
  17. 17.10 × 49 =
  18. 18.5 × 19 =
  19. 19.3 × 19 =
  20. 20.14 × 9 =
  21. 21.12 × 29 =
  22. 22.4 × 49 =
  23. 23.14 × 49 =
  24. 24.3 × 98 =
  25. 25.6 × 19 =
  26. 26.3 × 49 =
  27. 27.10 × 9 =
  28. 28.9 × 49 =
  29. 29.9 × 49 =
  30. 30.9 × 49 =
  31. 31.24 × 99 =
  32. 32.5 × 29 =
  33. 33.6 × 29 =
  34. 34.12 × 9 =
  35. 35.9 × 98 =
  36. 36.11 × 9 =
  37. 37.12 × 29 =
  38. 38.5 × 98 =
  39. 39.29 × 98 =
  40. 40.10 × 19 =

Answer key

  1. 45
  2. 3762
  3. 228
  4. 594
  5. 343
  6. 882
  7. 294
  8. 228
  9. 196
  10. 145
  11. 490
  12. 190
  13. 3332
  14. 147
  15. 54
  16. 3465
  17. 490
  18. 95
  19. 57
  20. 126
  21. 348
  22. 196
  23. 686
  24. 294
  25. 114
  26. 147
  27. 90
  28. 441
  29. 441
  30. 441
  31. 2376
  32. 145
  33. 174
  34. 108
  35. 882
  36. 99
  37. 348
  38. 490
  39. 2842
  40. 190

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