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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 507 · 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. 1.7 × 9 =
  2. 2.5 × 49 =
  3. 3.7 × 19 =
  4. 4.11 × 19 =
  5. 5.35 × 99 =
  6. 6.13 × 19 =
  7. 7.12 × 9 =
  8. 8.5 × 29 =
  9. 9.24 × 98 =
  10. 10.11 × 49 =
  11. 11.3 × 49 =
  12. 12.3 × 9 =
  13. 13.15 × 9 =
  14. 14.12 × 9 =
  15. 15.6 × 19 =
  16. 16.3 × 9 =
  17. 17.11 × 19 =
  18. 18.30 × 98 =
  19. 19.9 × 98 =
  20. 20.4 × 29 =
  21. 21.6 × 19 =
  22. 22.11 × 49 =
  23. 23.15 × 29 =
  24. 24.23 × 98 =
  25. 25.9 × 19 =
  26. 26.11 × 9 =
  27. 27.3 × 99 =
  28. 28.35 × 99 =
  29. 29.10 × 19 =
  30. 30.12 × 19 =
  31. 31.6 × 9 =
  32. 32.22 × 98 =
  33. 33.8 × 29 =
  34. 34.5 × 19 =
  35. 35.13 × 98 =
  36. 36.4 × 19 =
  37. 37.6 × 99 =
  38. 38.3 × 49 =
  39. 39.19 × 99 =
  40. 40.5 × 19 =

Answer key

  1. 63
  2. 245
  3. 133
  4. 209
  5. 3465
  6. 247
  7. 108
  8. 145
  9. 2352
  10. 539
  11. 147
  12. 27
  13. 135
  14. 108
  15. 114
  16. 27
  17. 209
  18. 2940
  19. 882
  20. 116
  21. 114
  22. 539
  23. 435
  24. 2254
  25. 171
  26. 99
  27. 297
  28. 3465
  29. 190
  30. 228
  31. 54
  32. 2156
  33. 232
  34. 95
  35. 1274
  36. 76
  37. 594
  38. 147
  39. 1881
  40. 95

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