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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 426 · 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. 1.12 × 29 =
  2. 2.11 × 29 =
  3. 3.5 × 49 =
  4. 4.9 × 9 =
  5. 5.11 × 19 =
  6. 6.10 × 29 =
  7. 7.7 × 29 =
  8. 8.10 × 99 =
  9. 9.9 × 29 =
  10. 10.4 × 9 =
  11. 11.9 × 19 =
  12. 12.4 × 29 =
  13. 13.10 × 98 =
  14. 14.14 × 49 =
  15. 15.4 × 9 =
  16. 16.7 × 49 =
  17. 17.6 × 49 =
  18. 18.7 × 29 =
  19. 19.31 × 99 =
  20. 20.14 × 99 =
  21. 21.17 × 99 =
  22. 22.6 × 19 =
  23. 23.10 × 99 =
  24. 24.34 × 99 =
  25. 25.9 × 19 =
  26. 26.6 × 9 =
  27. 27.8 × 9 =
  28. 28.7 × 49 =
  29. 29.6 × 19 =
  30. 30.3 × 19 =
  31. 31.4 × 98 =
  32. 32.35 × 98 =
  33. 33.5 × 49 =
  34. 34.7 × 99 =
  35. 35.13 × 49 =
  36. 36.6 × 19 =
  37. 37.35 × 99 =
  38. 38.5 × 9 =
  39. 39.14 × 9 =
  40. 40.14 × 29 =

Answer key

  1. 348
  2. 319
  3. 245
  4. 81
  5. 209
  6. 290
  7. 203
  8. 990
  9. 261
  10. 36
  11. 171
  12. 116
  13. 980
  14. 686
  15. 36
  16. 343
  17. 294
  18. 203
  19. 3069
  20. 1386
  21. 1683
  22. 114
  23. 990
  24. 3366
  25. 171
  26. 54
  27. 72
  28. 343
  29. 114
  30. 57
  31. 392
  32. 3430
  33. 245
  34. 693
  35. 637
  36. 114
  37. 3465
  38. 45
  39. 126
  40. 406

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