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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 187 · 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 × 9 =
  2. 2.3 × 29 =
  3. 3.14 × 9 =
  4. 4.8 × 29 =
  5. 5.11 × 19 =
  6. 6.10 × 49 =
  7. 7.14 × 19 =
  8. 8.7 × 9 =
  9. 9.13 × 99 =
  10. 10.14 × 19 =
  11. 11.12 × 98 =
  12. 12.15 × 99 =
  13. 13.11 × 29 =
  14. 14.3 × 9 =
  15. 15.10 × 9 =
  16. 16.14 × 29 =
  17. 17.15 × 9 =
  18. 18.12 × 29 =
  19. 19.14 × 29 =
  20. 20.3 × 49 =
  21. 21.13 × 99 =
  22. 22.15 × 99 =
  23. 23.12 × 99 =
  24. 24.29 × 98 =
  25. 25.12 × 19 =
  26. 26.4 × 49 =
  27. 27.10 × 49 =
  28. 28.6 × 9 =
  29. 29.9 × 49 =
  30. 30.4 × 29 =
  31. 31.4 × 99 =
  32. 32.3 × 98 =
  33. 33.28 × 98 =
  34. 34.4 × 49 =
  35. 35.3 × 9 =
  36. 36.37 × 99 =
  37. 37.10 × 49 =
  38. 38.7 × 19 =
  39. 39.10 × 9 =
  40. 40.13 × 29 =

Answer key

  1. 108
  2. 87
  3. 126
  4. 232
  5. 209
  6. 490
  7. 266
  8. 63
  9. 1287
  10. 266
  11. 1176
  12. 1485
  13. 319
  14. 27
  15. 90
  16. 406
  17. 135
  18. 348
  19. 406
  20. 147
  21. 1287
  22. 1485
  23. 1188
  24. 2842
  25. 228
  26. 196
  27. 490
  28. 54
  29. 441
  30. 116
  31. 396
  32. 294
  33. 2744
  34. 196
  35. 27
  36. 3663
  37. 490
  38. 133
  39. 90
  40. 377

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