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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 368 · 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. 1.34 × 98 =
  2. 2.10 × 49 =
  3. 3.7 × 9 =
  4. 4.14 × 19 =
  5. 5.5 × 49 =
  6. 6.3 × 19 =
  7. 7.6 × 29 =
  8. 8.10 × 29 =
  9. 9.23 × 99 =
  10. 10.10 × 9 =
  11. 11.5 × 98 =
  12. 12.11 × 9 =
  13. 13.11 × 9 =
  14. 14.5 × 29 =
  15. 15.9 × 19 =
  16. 16.6 × 19 =
  17. 17.15 × 9 =
  18. 18.5 × 49 =
  19. 19.3 × 29 =
  20. 20.9 × 49 =
  21. 21.9 × 29 =
  22. 22.12 × 19 =
  23. 23.11 × 29 =
  24. 24.7 × 9 =
  25. 25.4 × 29 =
  26. 26.7 × 19 =
  27. 27.7 × 29 =
  28. 28.3 × 19 =
  29. 29.3 × 19 =
  30. 30.3 × 29 =
  31. 31.5 × 19 =
  32. 32.7 × 19 =
  33. 33.33 × 99 =
  34. 34.39 × 98 =
  35. 35.33 × 99 =
  36. 36.9 × 29 =
  37. 37.4 × 49 =
  38. 38.28 × 98 =
  39. 39.12 × 29 =
  40. 40.24 × 98 =

Answer key

  1. 3332
  2. 490
  3. 63
  4. 266
  5. 245
  6. 57
  7. 174
  8. 290
  9. 2277
  10. 90
  11. 490
  12. 99
  13. 99
  14. 145
  15. 171
  16. 114
  17. 135
  18. 245
  19. 87
  20. 441
  21. 261
  22. 228
  23. 319
  24. 63
  25. 116
  26. 133
  27. 203
  28. 57
  29. 57
  30. 87
  31. 95
  32. 133
  33. 3267
  34. 3822
  35. 3267
  36. 261
  37. 196
  38. 2744
  39. 348
  40. 2352

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