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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 223 · 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. 1.7 × 19 =
  2. 2.8 × 49 =
  3. 3.19 × 98 =
  4. 4.13 × 29 =
  5. 5.12 × 29 =
  6. 6.6 × 49 =
  7. 7.8 × 19 =
  8. 8.13 × 49 =
  9. 9.11 × 9 =
  10. 10.6 × 19 =
  11. 11.4 × 19 =
  12. 12.39 × 98 =
  13. 13.13 × 98 =
  14. 14.13 × 29 =
  15. 15.12 × 19 =
  16. 16.31 × 99 =
  17. 17.6 × 49 =
  18. 18.4 × 49 =
  19. 19.13 × 19 =
  20. 20.14 × 49 =
  21. 21.25 × 99 =
  22. 22.6 × 29 =
  23. 23.15 × 9 =
  24. 24.11 × 29 =
  25. 25.8 × 99 =
  26. 26.22 × 99 =
  27. 27.4 × 49 =
  28. 28.3 × 9 =
  29. 29.3 × 99 =
  30. 30.14 × 29 =
  31. 31.11 × 49 =
  32. 32.9 × 49 =
  33. 33.3 × 99 =
  34. 34.14 × 99 =
  35. 35.11 × 19 =
  36. 36.10 × 9 =
  37. 37.9 × 49 =
  38. 38.26 × 98 =
  39. 39.15 × 49 =
  40. 40.3 × 98 =

Answer key

  1. 133
  2. 392
  3. 1862
  4. 377
  5. 348
  6. 294
  7. 152
  8. 637
  9. 99
  10. 114
  11. 76
  12. 3822
  13. 1274
  14. 377
  15. 228
  16. 3069
  17. 294
  18. 196
  19. 247
  20. 686
  21. 2475
  22. 174
  23. 135
  24. 319
  25. 792
  26. 2178
  27. 196
  28. 27
  29. 297
  30. 406
  31. 539
  32. 441
  33. 297
  34. 1386
  35. 209
  36. 90
  37. 441
  38. 2548
  39. 735
  40. 294

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