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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 806 · 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 × 99 =
  2. 2.19 × 98 =
  3. 3.8 × 49 =
  4. 4.9 × 29 =
  5. 5.6 × 29 =
  6. 6.12 × 9 =
  7. 7.10 × 19 =
  8. 8.8 × 19 =
  9. 9.15 × 19 =
  10. 10.4 × 99 =
  11. 11.14 × 98 =
  12. 12.15 × 9 =
  13. 13.13 × 19 =
  14. 14.34 × 98 =
  15. 15.3 × 98 =
  16. 16.13 × 99 =
  17. 17.4 × 99 =
  18. 18.6 × 19 =
  19. 19.9 × 19 =
  20. 20.18 × 99 =
  21. 21.13 × 9 =
  22. 22.26 × 99 =
  23. 23.13 × 29 =
  24. 24.8 × 9 =
  25. 25.14 × 98 =
  26. 26.6 × 29 =
  27. 27.12 × 19 =
  28. 28.14 × 19 =
  29. 29.6 × 99 =
  30. 30.9 × 29 =
  31. 31.31 × 98 =
  32. 32.29 × 99 =
  33. 33.4 × 99 =
  34. 34.14 × 9 =
  35. 35.5 × 9 =
  36. 36.7 × 9 =
  37. 37.4 × 29 =
  38. 38.8 × 29 =
  39. 39.14 × 19 =
  40. 40.3 × 9 =

Answer key

  1. 990
  2. 1862
  3. 392
  4. 261
  5. 174
  6. 108
  7. 190
  8. 152
  9. 285
  10. 396
  11. 1372
  12. 135
  13. 247
  14. 3332
  15. 294
  16. 1287
  17. 396
  18. 114
  19. 171
  20. 1782
  21. 117
  22. 2574
  23. 377
  24. 72
  25. 1372
  26. 174
  27. 228
  28. 266
  29. 594
  30. 261
  31. 3038
  32. 2871
  33. 396
  34. 126
  35. 45
  36. 63
  37. 116
  38. 232
  39. 266
  40. 27

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