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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 397 · 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. 1.13 × 19 =
  2. 2.10 × 29 =
  3. 3.14 × 99 =
  4. 4.15 × 49 =
  5. 5.7 × 49 =
  6. 6.12 × 19 =
  7. 7.11 × 9 =
  8. 8.5 × 19 =
  9. 9.17 × 98 =
  10. 10.11 × 19 =
  11. 11.10 × 19 =
  12. 12.6 × 19 =
  13. 13.11 × 98 =
  14. 14.8 × 98 =
  15. 15.11 × 29 =
  16. 16.32 × 98 =
  17. 17.26 × 99 =
  18. 18.7 × 49 =
  19. 19.8 × 9 =
  20. 20.5 × 49 =
  21. 21.8 × 9 =
  22. 22.5 × 19 =
  23. 23.9 × 19 =
  24. 24.12 × 9 =
  25. 25.15 × 19 =
  26. 26.12 × 98 =
  27. 27.11 × 9 =
  28. 28.31 × 98 =
  29. 29.10 × 19 =
  30. 30.9 × 99 =
  31. 31.26 × 99 =
  32. 32.12 × 19 =
  33. 33.14 × 29 =
  34. 34.32 × 98 =
  35. 35.15 × 9 =
  36. 36.10 × 19 =
  37. 37.14 × 49 =
  38. 38.8 × 98 =
  39. 39.3 × 19 =
  40. 40.10 × 29 =

Answer key

  1. 247
  2. 290
  3. 1386
  4. 735
  5. 343
  6. 228
  7. 99
  8. 95
  9. 1666
  10. 209
  11. 190
  12. 114
  13. 1078
  14. 784
  15. 319
  16. 3136
  17. 2574
  18. 343
  19. 72
  20. 245
  21. 72
  22. 95
  23. 171
  24. 108
  25. 285
  26. 1176
  27. 99
  28. 3038
  29. 190
  30. 891
  31. 2574
  32. 228
  33. 406
  34. 3136
  35. 135
  36. 190
  37. 686
  38. 784
  39. 57
  40. 290

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