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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 900 · 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 × 19 =
  2. 2.5 × 9 =
  3. 3.14 × 29 =
  4. 4.9 × 99 =
  5. 5.8 × 9 =
  6. 6.11 × 29 =
  7. 7.10 × 29 =
  8. 8.37 × 99 =
  9. 9.30 × 98 =
  10. 10.6 × 9 =
  11. 11.10 × 49 =
  12. 12.3 × 19 =
  13. 13.11 × 9 =
  14. 14.5 × 19 =
  15. 15.12 × 49 =
  16. 16.14 × 99 =
  17. 17.15 × 9 =
  18. 18.30 × 99 =
  19. 19.9 × 19 =
  20. 20.3 × 29 =
  21. 21.40 × 98 =
  22. 22.12 × 19 =
  23. 23.32 × 98 =
  24. 24.4 × 49 =
  25. 25.11 × 49 =
  26. 26.32 × 98 =
  27. 27.33 × 98 =
  28. 28.14 × 99 =
  29. 29.8 × 19 =
  30. 30.12 × 29 =
  31. 31.14 × 19 =
  32. 32.4 × 29 =
  33. 33.14 × 19 =
  34. 34.6 × 9 =
  35. 35.5 × 29 =
  36. 36.34 × 99 =
  37. 37.36 × 98 =
  38. 38.7 × 29 =
  39. 39.13 × 19 =
  40. 40.12 × 98 =

Answer key

  1. 114
  2. 45
  3. 406
  4. 891
  5. 72
  6. 319
  7. 290
  8. 3663
  9. 2940
  10. 54
  11. 490
  12. 57
  13. 99
  14. 95
  15. 588
  16. 1386
  17. 135
  18. 2970
  19. 171
  20. 87
  21. 3920
  22. 228
  23. 3136
  24. 196
  25. 539
  26. 3136
  27. 3234
  28. 1386
  29. 152
  30. 348
  31. 266
  32. 116
  33. 266
  34. 54
  35. 145
  36. 3366
  37. 3528
  38. 203
  39. 247
  40. 1176

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