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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 290 · 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. 1.11 × 99 =
  2. 2.4 × 49 =
  3. 3.14 × 9 =
  4. 4.5 × 9 =
  5. 5.27 × 99 =
  6. 6.4 × 9 =
  7. 7.15 × 9 =
  8. 8.7 × 98 =
  9. 9.23 × 98 =
  10. 10.23 × 98 =
  11. 11.5 × 49 =
  12. 12.9 × 19 =
  13. 13.4 × 9 =
  14. 14.11 × 9 =
  15. 15.8 × 49 =
  16. 16.6 × 19 =
  17. 17.15 × 19 =
  18. 18.14 × 98 =
  19. 19.7 × 9 =
  20. 20.10 × 19 =
  21. 21.6 × 9 =
  22. 22.7 × 98 =
  23. 23.15 × 19 =
  24. 24.5 × 49 =
  25. 25.4 × 9 =
  26. 26.23 × 99 =
  27. 27.38 × 98 =
  28. 28.9 × 99 =
  29. 29.5 × 9 =
  30. 30.15 × 9 =
  31. 31.13 × 9 =
  32. 32.5 × 49 =
  33. 33.7 × 19 =
  34. 34.14 × 49 =
  35. 35.7 × 49 =
  36. 36.8 × 9 =
  37. 37.13 × 9 =
  38. 38.8 × 49 =
  39. 39.11 × 49 =
  40. 40.6 × 9 =

Answer key

  1. 1089
  2. 196
  3. 126
  4. 45
  5. 2673
  6. 36
  7. 135
  8. 686
  9. 2254
  10. 2254
  11. 245
  12. 171
  13. 36
  14. 99
  15. 392
  16. 114
  17. 285
  18. 1372
  19. 63
  20. 190
  21. 54
  22. 686
  23. 285
  24. 245
  25. 36
  26. 2277
  27. 3724
  28. 891
  29. 45
  30. 135
  31. 117
  32. 245
  33. 133
  34. 686
  35. 343
  36. 72
  37. 117
  38. 392
  39. 539
  40. 54

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