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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 206 · 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. 1.10 × 29 =
  2. 2.13 × 49 =
  3. 3.7 × 19 =
  4. 4.10 × 29 =
  5. 5.8 × 19 =
  6. 6.5 × 29 =
  7. 7.12 × 9 =
  8. 8.4 × 49 =
  9. 9.14 × 9 =
  10. 10.7 × 98 =
  11. 11.14 × 98 =
  12. 12.9 × 98 =
  13. 13.15 × 9 =
  14. 14.5 × 49 =
  15. 15.13 × 29 =
  16. 16.10 × 49 =
  17. 17.14 × 49 =
  18. 18.13 × 19 =
  19. 19.9 × 98 =
  20. 20.5 × 29 =
  21. 21.14 × 29 =
  22. 22.21 × 98 =
  23. 23.25 × 98 =
  24. 24.14 × 19 =
  25. 25.5 × 9 =
  26. 26.6 × 9 =
  27. 27.24 × 99 =
  28. 28.36 × 98 =
  29. 29.10 × 9 =
  30. 30.15 × 19 =
  31. 31.10 × 19 =
  32. 32.4 × 99 =
  33. 33.14 × 29 =
  34. 34.14 × 9 =
  35. 35.36 × 99 =
  36. 36.12 × 29 =
  37. 37.10 × 29 =
  38. 38.3 × 9 =
  39. 39.14 × 29 =
  40. 40.11 × 19 =

Answer key

  1. 290
  2. 637
  3. 133
  4. 290
  5. 152
  6. 145
  7. 108
  8. 196
  9. 126
  10. 686
  11. 1372
  12. 882
  13. 135
  14. 245
  15. 377
  16. 490
  17. 686
  18. 247
  19. 882
  20. 145
  21. 406
  22. 2058
  23. 2450
  24. 266
  25. 45
  26. 54
  27. 2376
  28. 3528
  29. 90
  30. 285
  31. 190
  32. 396
  33. 406
  34. 126
  35. 3564
  36. 348
  37. 290
  38. 27
  39. 406
  40. 209

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