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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 607 · 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. 2.12 × 99 =
  3. 3.11 × 99 =
  4. 4.14 × 9 =
  5. 5.17 × 98 =
  6. 6.13 × 98 =
  7. 7.7 × 29 =
  8. 8.30 × 99 =
  9. 9.15 × 98 =
  10. 10.6 × 49 =
  11. 11.12 × 49 =
  12. 12.14 × 9 =
  13. 13.7 × 99 =
  14. 14.12 × 29 =
  15. 15.9 × 49 =
  16. 16.13 × 9 =
  17. 17.14 × 19 =
  18. 18.13 × 9 =
  19. 19.11 × 29 =
  20. 20.7 × 98 =
  21. 21.9 × 98 =
  22. 22.27 × 99 =
  23. 23.10 × 9 =
  24. 24.4 × 98 =
  25. 25.10 × 19 =
  26. 26.14 × 98 =
  27. 27.5 × 19 =
  28. 28.5 × 98 =
  29. 29.12 × 49 =
  30. 30.9 × 49 =
  31. 31.19 × 99 =
  32. 32.5 × 9 =
  33. 33.6 × 29 =
  34. 34.8 × 9 =
  35. 35.6 × 98 =
  36. 36.3 × 49 =
  37. 37.15 × 49 =
  38. 38.3 × 19 =
  39. 39.31 × 98 =
  40. 40.21 × 99 =

Answer key

  1. 290
  2. 1188
  3. 1089
  4. 126
  5. 1666
  6. 1274
  7. 203
  8. 2970
  9. 1470
  10. 294
  11. 588
  12. 126
  13. 693
  14. 348
  15. 441
  16. 117
  17. 266
  18. 117
  19. 319
  20. 686
  21. 882
  22. 2673
  23. 90
  24. 392
  25. 190
  26. 1372
  27. 95
  28. 490
  29. 588
  30. 441
  31. 1881
  32. 45
  33. 174
  34. 72
  35. 588
  36. 147
  37. 735
  38. 57
  39. 3038
  40. 2079

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