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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 79 · 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. 1.6 × 29 =
  2. 2.9 × 9 =
  3. 3.4 × 49 =
  4. 4.38 × 98 =
  5. 5.5 × 19 =
  6. 6.3 × 29 =
  7. 7.13 × 98 =
  8. 8.30 × 98 =
  9. 9.13 × 9 =
  10. 10.8 × 98 =
  11. 11.33 × 98 =
  12. 12.5 × 9 =
  13. 13.11 × 9 =
  14. 14.23 × 98 =
  15. 15.6 × 9 =
  16. 16.15 × 19 =
  17. 17.6 × 9 =
  18. 18.13 × 19 =
  19. 19.6 × 9 =
  20. 20.9 × 98 =
  21. 21.12 × 19 =
  22. 22.6 × 29 =
  23. 23.6 × 19 =
  24. 24.9 × 9 =
  25. 25.6 × 9 =
  26. 26.18 × 98 =
  27. 27.11 × 49 =
  28. 28.40 × 99 =
  29. 29.22 × 98 =
  30. 30.3 × 9 =
  31. 31.14 × 19 =
  32. 32.5 × 98 =
  33. 33.12 × 29 =
  34. 34.9 × 19 =
  35. 35.9 × 98 =
  36. 36.9 × 99 =
  37. 37.11 × 49 =
  38. 38.9 × 29 =
  39. 39.15 × 9 =
  40. 40.31 × 99 =

Answer key

  1. 174
  2. 81
  3. 196
  4. 3724
  5. 95
  6. 87
  7. 1274
  8. 2940
  9. 117
  10. 784
  11. 3234
  12. 45
  13. 99
  14. 2254
  15. 54
  16. 285
  17. 54
  18. 247
  19. 54
  20. 882
  21. 228
  22. 174
  23. 114
  24. 81
  25. 54
  26. 1764
  27. 539
  28. 3960
  29. 2156
  30. 27
  31. 266
  32. 490
  33. 348
  34. 171
  35. 882
  36. 891
  37. 539
  38. 261
  39. 135
  40. 3069

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