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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 925 · 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. 1.10 × 29 =
  2. 2.19 × 98 =
  3. 3.9 × 98 =
  4. 4.13 × 49 =
  5. 5.3 × 29 =
  6. 6.14 × 49 =
  7. 7.9 × 9 =
  8. 8.35 × 99 =
  9. 9.15 × 29 =
  10. 10.6 × 19 =
  11. 11.5 × 19 =
  12. 12.7 × 9 =
  13. 13.18 × 99 =
  14. 14.8 × 19 =
  15. 15.28 × 98 =
  16. 16.5 × 19 =
  17. 17.6 × 49 =
  18. 18.7 × 9 =
  19. 19.3 × 49 =
  20. 20.3 × 9 =
  21. 21.14 × 19 =
  22. 22.34 × 99 =
  23. 23.15 × 9 =
  24. 24.14 × 9 =
  25. 25.15 × 49 =
  26. 26.10 × 9 =
  27. 27.25 × 99 =
  28. 28.5 × 9 =
  29. 29.3 × 29 =
  30. 30.40 × 99 =
  31. 31.5 × 29 =
  32. 32.7 × 49 =
  33. 33.11 × 9 =
  34. 34.11 × 19 =
  35. 35.3 × 9 =
  36. 36.14 × 99 =
  37. 37.5 × 19 =
  38. 38.5 × 19 =
  39. 39.23 × 98 =
  40. 40.6 × 29 =

Answer key

  1. 290
  2. 1862
  3. 882
  4. 637
  5. 87
  6. 686
  7. 81
  8. 3465
  9. 435
  10. 114
  11. 95
  12. 63
  13. 1782
  14. 152
  15. 2744
  16. 95
  17. 294
  18. 63
  19. 147
  20. 27
  21. 266
  22. 3366
  23. 135
  24. 126
  25. 735
  26. 90
  27. 2475
  28. 45
  29. 87
  30. 3960
  31. 145
  32. 343
  33. 99
  34. 209
  35. 27
  36. 1386
  37. 95
  38. 95
  39. 2254
  40. 174

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