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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 421 · 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 × 49 =
  2. 2.13 × 9 =
  3. 3.3 × 19 =
  4. 4.25 × 99 =
  5. 5.6 × 49 =
  6. 6.15 × 29 =
  7. 7.23 × 99 =
  8. 8.27 × 98 =
  9. 9.7 × 99 =
  10. 10.9 × 29 =
  11. 11.33 × 98 =
  12. 12.22 × 98 =
  13. 13.7 × 9 =
  14. 14.5 × 98 =
  15. 15.4 × 99 =
  16. 16.5 × 29 =
  17. 17.18 × 98 =
  18. 18.12 × 29 =
  19. 19.3 × 9 =
  20. 20.4 × 19 =
  21. 21.7 × 9 =
  22. 22.7 × 19 =
  23. 23.8 × 19 =
  24. 24.9 × 98 =
  25. 25.8 × 49 =
  26. 26.13 × 19 =
  27. 27.6 × 19 =
  28. 28.7 × 19 =
  29. 29.27 × 98 =
  30. 30.4 × 29 =
  31. 31.8 × 19 =
  32. 32.15 × 19 =
  33. 33.33 × 99 =
  34. 34.7 × 9 =
  35. 35.4 × 98 =
  36. 36.34 × 99 =
  37. 37.35 × 99 =
  38. 38.17 × 99 =
  39. 39.3 × 19 =
  40. 40.10 × 98 =

Answer key

  1. 147
  2. 117
  3. 57
  4. 2475
  5. 294
  6. 435
  7. 2277
  8. 2646
  9. 693
  10. 261
  11. 3234
  12. 2156
  13. 63
  14. 490
  15. 396
  16. 145
  17. 1764
  18. 348
  19. 27
  20. 76
  21. 63
  22. 133
  23. 152
  24. 882
  25. 392
  26. 247
  27. 114
  28. 133
  29. 2646
  30. 116
  31. 152
  32. 285
  33. 3267
  34. 63
  35. 392
  36. 3366
  37. 3465
  38. 1683
  39. 57
  40. 980

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