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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 30 · 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. 1.20 × 98 =
  2. 2.5 × 19 =
  3. 3.4 × 99 =
  4. 4.3 × 9 =
  5. 5.13 × 9 =
  6. 6.11 × 9 =
  7. 7.7 × 29 =
  8. 8.40 × 98 =
  9. 9.14 × 98 =
  10. 10.8 × 49 =
  11. 11.7 × 9 =
  12. 12.7 × 29 =
  13. 13.3 × 9 =
  14. 14.5 × 29 =
  15. 15.33 × 99 =
  16. 16.4 × 19 =
  17. 17.15 × 9 =
  18. 18.6 × 19 =
  19. 19.11 × 9 =
  20. 20.5 × 49 =
  21. 21.13 × 29 =
  22. 22.9 × 49 =
  23. 23.9 × 29 =
  24. 24.7 × 49 =
  25. 25.9 × 19 =
  26. 26.12 × 19 =
  27. 27.4 × 49 =
  28. 28.5 × 19 =
  29. 29.4 × 19 =
  30. 30.3 × 99 =
  31. 31.14 × 19 =
  32. 32.5 × 9 =
  33. 33.14 × 9 =
  34. 34.23 × 99 =
  35. 35.11 × 98 =
  36. 36.24 × 99 =
  37. 37.4 × 49 =
  38. 38.13 × 9 =
  39. 39.10 × 49 =
  40. 40.8 × 9 =

Answer key

  1. 1960
  2. 95
  3. 396
  4. 27
  5. 117
  6. 99
  7. 203
  8. 3920
  9. 1372
  10. 392
  11. 63
  12. 203
  13. 27
  14. 145
  15. 3267
  16. 76
  17. 135
  18. 114
  19. 99
  20. 245
  21. 377
  22. 441
  23. 261
  24. 343
  25. 171
  26. 228
  27. 196
  28. 95
  29. 76
  30. 297
  31. 266
  32. 45
  33. 126
  34. 2277
  35. 1078
  36. 2376
  37. 196
  38. 117
  39. 490
  40. 72

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