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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 778 · 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. 1.26 × 99 =
  2. 2.8 × 49 =
  3. 3.10 × 9 =
  4. 4.11 × 49 =
  5. 5.4 × 49 =
  6. 6.7 × 9 =
  7. 7.12 × 99 =
  8. 8.14 × 9 =
  9. 9.8 × 98 =
  10. 10.29 × 98 =
  11. 11.16 × 98 =
  12. 12.12 × 29 =
  13. 13.6 × 98 =
  14. 14.13 × 49 =
  15. 15.21 × 98 =
  16. 16.21 × 98 =
  17. 17.5 × 9 =
  18. 18.13 × 19 =
  19. 19.14 × 19 =
  20. 20.6 × 29 =
  21. 21.11 × 99 =
  22. 22.10 × 19 =
  23. 23.7 × 9 =
  24. 24.12 × 98 =
  25. 25.6 × 49 =
  26. 26.4 × 29 =
  27. 27.30 × 99 =
  28. 28.5 × 29 =
  29. 29.23 × 98 =
  30. 30.22 × 99 =
  31. 31.7 × 9 =
  32. 32.15 × 19 =
  33. 33.15 × 99 =
  34. 34.3 × 9 =
  35. 35.9 × 9 =
  36. 36.12 × 29 =
  37. 37.14 × 29 =
  38. 38.9 × 49 =
  39. 39.4 × 19 =
  40. 40.8 × 9 =

Answer key

  1. 2574
  2. 392
  3. 90
  4. 539
  5. 196
  6. 63
  7. 1188
  8. 126
  9. 784
  10. 2842
  11. 1568
  12. 348
  13. 588
  14. 637
  15. 2058
  16. 2058
  17. 45
  18. 247
  19. 266
  20. 174
  21. 1089
  22. 190
  23. 63
  24. 1176
  25. 294
  26. 116
  27. 2970
  28. 145
  29. 2254
  30. 2178
  31. 63
  32. 285
  33. 1485
  34. 27
  35. 81
  36. 348
  37. 406
  38. 441
  39. 76
  40. 72

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