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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 646 · 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. 1.8 × 19 =
  2. 2.6 × 98 =
  3. 3.15 × 29 =
  4. 4.5 × 19 =
  5. 5.30 × 99 =
  6. 6.15 × 19 =
  7. 7.16 × 98 =
  8. 8.8 × 19 =
  9. 9.31 × 98 =
  10. 10.10 × 29 =
  11. 11.3 × 49 =
  12. 12.4 × 98 =
  13. 13.11 × 99 =
  14. 14.11 × 49 =
  15. 15.6 × 19 =
  16. 16.12 × 19 =
  17. 17.3 × 9 =
  18. 18.27 × 98 =
  19. 19.11 × 19 =
  20. 20.3 × 19 =
  21. 21.4 × 29 =
  22. 22.14 × 19 =
  23. 23.5 × 29 =
  24. 24.7 × 9 =
  25. 25.15 × 29 =
  26. 26.12 × 19 =
  27. 27.6 × 29 =
  28. 28.6 × 9 =
  29. 29.15 × 9 =
  30. 30.14 × 29 =
  31. 31.13 × 9 =
  32. 32.7 × 29 =
  33. 33.5 × 9 =
  34. 34.31 × 98 =
  35. 35.29 × 98 =
  36. 36.5 × 19 =
  37. 37.6 × 29 =
  38. 38.9 × 49 =
  39. 39.7 × 29 =
  40. 40.4 × 9 =

Answer key

  1. 152
  2. 588
  3. 435
  4. 95
  5. 2970
  6. 285
  7. 1568
  8. 152
  9. 3038
  10. 290
  11. 147
  12. 392
  13. 1089
  14. 539
  15. 114
  16. 228
  17. 27
  18. 2646
  19. 209
  20. 57
  21. 116
  22. 266
  23. 145
  24. 63
  25. 435
  26. 228
  27. 174
  28. 54
  29. 135
  30. 406
  31. 117
  32. 203
  33. 45
  34. 3038
  35. 2842
  36. 95
  37. 174
  38. 441
  39. 203
  40. 36

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