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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 122 · 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. 1.11 × 19 =
  2. 2.16 × 99 =
  3. 3.8 × 98 =
  4. 4.13 × 49 =
  5. 5.9 × 9 =
  6. 6.4 × 49 =
  7. 7.14 × 9 =
  8. 8.11 × 9 =
  9. 9.7 × 29 =
  10. 10.4 × 9 =
  11. 11.12 × 19 =
  12. 12.34 × 98 =
  13. 13.35 × 99 =
  14. 14.14 × 99 =
  15. 15.7 × 9 =
  16. 16.10 × 49 =
  17. 17.17 × 98 =
  18. 18.5 × 9 =
  19. 19.29 × 99 =
  20. 20.10 × 9 =
  21. 21.3 × 49 =
  22. 22.13 × 9 =
  23. 23.9 × 19 =
  24. 24.7 × 29 =
  25. 25.9 × 9 =
  26. 26.7 × 29 =
  27. 27.5 × 99 =
  28. 28.7 × 99 =
  29. 29.10 × 9 =
  30. 30.37 × 98 =
  31. 31.30 × 99 =
  32. 32.15 × 19 =
  33. 33.8 × 49 =
  34. 34.6 × 49 =
  35. 35.3 × 99 =
  36. 36.7 × 29 =
  37. 37.3 × 29 =
  38. 38.12 × 19 =
  39. 39.10 × 29 =
  40. 40.9 × 29 =

Answer key

  1. 209
  2. 1584
  3. 784
  4. 637
  5. 81
  6. 196
  7. 126
  8. 99
  9. 203
  10. 36
  11. 228
  12. 3332
  13. 3465
  14. 1386
  15. 63
  16. 490
  17. 1666
  18. 45
  19. 2871
  20. 90
  21. 147
  22. 117
  23. 171
  24. 203
  25. 81
  26. 203
  27. 495
  28. 693
  29. 90
  30. 3626
  31. 2970
  32. 285
  33. 392
  34. 294
  35. 297
  36. 203
  37. 87
  38. 228
  39. 290
  40. 261

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