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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 798 · 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. 1.9 × 29 =
  2. 2.10 × 49 =
  3. 3.9 × 19 =
  4. 4.12 × 29 =
  5. 5.7 × 49 =
  6. 6.5 × 9 =
  7. 7.14 × 29 =
  8. 8.12 × 98 =
  9. 9.7 × 19 =
  10. 10.4 × 9 =
  11. 11.5 × 9 =
  12. 12.15 × 29 =
  13. 13.3 × 9 =
  14. 14.4 × 29 =
  15. 15.6 × 19 =
  16. 16.12 × 99 =
  17. 17.9 × 9 =
  18. 18.12 × 49 =
  19. 19.5 × 19 =
  20. 20.10 × 98 =
  21. 21.3 × 9 =
  22. 22.10 × 99 =
  23. 23.13 × 9 =
  24. 24.5 × 29 =
  25. 25.13 × 99 =
  26. 26.3 × 49 =
  27. 27.5 × 19 =
  28. 28.10 × 98 =
  29. 29.13 × 29 =
  30. 30.35 × 99 =
  31. 31.5 × 19 =
  32. 32.4 × 49 =
  33. 33.10 × 29 =
  34. 34.11 × 29 =
  35. 35.14 × 9 =
  36. 36.7 × 9 =
  37. 37.14 × 9 =
  38. 38.6 × 19 =
  39. 39.5 × 29 =
  40. 40.7 × 29 =

Answer key

  1. 261
  2. 490
  3. 171
  4. 348
  5. 343
  6. 45
  7. 406
  8. 1176
  9. 133
  10. 36
  11. 45
  12. 435
  13. 27
  14. 116
  15. 114
  16. 1188
  17. 81
  18. 588
  19. 95
  20. 980
  21. 27
  22. 990
  23. 117
  24. 145
  25. 1287
  26. 147
  27. 95
  28. 980
  29. 377
  30. 3465
  31. 95
  32. 196
  33. 290
  34. 319
  35. 126
  36. 63
  37. 126
  38. 114
  39. 145
  40. 203

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