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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 347 · 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. 1.15 × 9 =
  2. 2.9 × 99 =
  3. 3.10 × 9 =
  4. 4.23 × 98 =
  5. 5.12 × 19 =
  6. 6.3 × 19 =
  7. 7.8 × 29 =
  8. 8.5 × 19 =
  9. 9.14 × 29 =
  10. 10.11 × 49 =
  11. 11.13 × 9 =
  12. 12.5 × 19 =
  13. 13.15 × 49 =
  14. 14.6 × 99 =
  15. 15.14 × 49 =
  16. 16.10 × 9 =
  17. 17.3 × 98 =
  18. 18.11 × 9 =
  19. 19.7 × 29 =
  20. 20.6 × 19 =
  21. 21.8 × 99 =
  22. 22.14 × 49 =
  23. 23.9 × 9 =
  24. 24.5 × 19 =
  25. 25.14 × 9 =
  26. 26.10 × 19 =
  27. 27.3 × 19 =
  28. 28.10 × 19 =
  29. 29.14 × 49 =
  30. 30.11 × 98 =
  31. 31.5 × 98 =
  32. 32.11 × 29 =
  33. 33.14 × 49 =
  34. 34.11 × 98 =
  35. 35.21 × 98 =
  36. 36.7 × 29 =
  37. 37.20 × 98 =
  38. 38.3 × 29 =
  39. 39.8 × 49 =
  40. 40.8 × 9 =

Answer key

  1. 135
  2. 891
  3. 90
  4. 2254
  5. 228
  6. 57
  7. 232
  8. 95
  9. 406
  10. 539
  11. 117
  12. 95
  13. 735
  14. 594
  15. 686
  16. 90
  17. 294
  18. 99
  19. 203
  20. 114
  21. 792
  22. 686
  23. 81
  24. 95
  25. 126
  26. 190
  27. 57
  28. 190
  29. 686
  30. 1078
  31. 490
  32. 319
  33. 686
  34. 1078
  35. 2058
  36. 203
  37. 1960
  38. 87
  39. 392
  40. 72

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