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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 356 · 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 × 29 =
  2. 2.6 × 98 =
  3. 3.10 × 9 =
  4. 4.4 × 19 =
  5. 5.3 × 9 =
  6. 6.3 × 29 =
  7. 7.4 × 19 =
  8. 8.35 × 99 =
  9. 9.6 × 49 =
  10. 10.10 × 49 =
  11. 11.12 × 19 =
  12. 12.9 × 9 =
  13. 13.14 × 19 =
  14. 14.3 × 9 =
  15. 15.9 × 29 =
  16. 16.9 × 19 =
  17. 17.34 × 98 =
  18. 18.12 × 19 =
  19. 19.15 × 9 =
  20. 20.8 × 9 =
  21. 21.9 × 49 =
  22. 22.7 × 19 =
  23. 23.10 × 9 =
  24. 24.5 × 9 =
  25. 25.28 × 98 =
  26. 26.10 × 99 =
  27. 27.12 × 29 =
  28. 28.10 × 99 =
  29. 29.5 × 29 =
  30. 30.15 × 9 =
  31. 31.11 × 9 =
  32. 32.22 × 99 =
  33. 33.15 × 98 =
  34. 34.4 × 9 =
  35. 35.13 × 19 =
  36. 36.8 × 49 =
  37. 37.14 × 9 =
  38. 38.6 × 49 =
  39. 39.12 × 98 =
  40. 40.3 × 29 =

Answer key

  1. 348
  2. 588
  3. 90
  4. 76
  5. 27
  6. 87
  7. 76
  8. 3465
  9. 294
  10. 490
  11. 228
  12. 81
  13. 266
  14. 27
  15. 261
  16. 171
  17. 3332
  18. 228
  19. 135
  20. 72
  21. 441
  22. 133
  23. 90
  24. 45
  25. 2744
  26. 990
  27. 348
  28. 990
  29. 145
  30. 135
  31. 99
  32. 2178
  33. 1470
  34. 36
  35. 247
  36. 392
  37. 126
  38. 294
  39. 1176
  40. 87

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