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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 628 · 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. 1.8 × 98 =
  2. 2.11 × 29 =
  3. 3.5 × 9 =
  4. 4.4 × 49 =
  5. 5.7 × 19 =
  6. 6.12 × 49 =
  7. 7.15 × 49 =
  8. 8.12 × 9 =
  9. 9.12 × 29 =
  10. 10.4 × 19 =
  11. 11.15 × 98 =
  12. 12.3 × 9 =
  13. 13.12 × 19 =
  14. 14.7 × 9 =
  15. 15.3 × 19 =
  16. 16.12 × 99 =
  17. 17.9 × 9 =
  18. 18.5 × 29 =
  19. 19.36 × 99 =
  20. 20.5 × 98 =
  21. 21.3 × 49 =
  22. 22.7 × 49 =
  23. 23.7 × 9 =
  24. 24.9 × 29 =
  25. 25.9 × 49 =
  26. 26.3 × 98 =
  27. 27.9 × 29 =
  28. 28.3 × 9 =
  29. 29.12 × 29 =
  30. 30.11 × 49 =
  31. 31.12 × 9 =
  32. 32.3 × 9 =
  33. 33.32 × 99 =
  34. 34.11 × 19 =
  35. 35.8 × 9 =
  36. 36.7 × 49 =
  37. 37.6 × 9 =
  38. 38.19 × 98 =
  39. 39.9 × 9 =
  40. 40.3 × 9 =

Answer key

  1. 784
  2. 319
  3. 45
  4. 196
  5. 133
  6. 588
  7. 735
  8. 108
  9. 348
  10. 76
  11. 1470
  12. 27
  13. 228
  14. 63
  15. 57
  16. 1188
  17. 81
  18. 145
  19. 3564
  20. 490
  21. 147
  22. 343
  23. 63
  24. 261
  25. 441
  26. 294
  27. 261
  28. 27
  29. 348
  30. 539
  31. 108
  32. 27
  33. 3168
  34. 209
  35. 72
  36. 343
  37. 54
  38. 1862
  39. 81
  40. 27

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