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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 739 · 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. 1.4 × 29 =
  2. 2.4 × 9 =
  3. 3.8 × 9 =
  4. 4.28 × 98 =
  5. 5.5 × 19 =
  6. 6.15 × 49 =
  7. 7.3 × 19 =
  8. 8.14 × 49 =
  9. 9.5 × 19 =
  10. 10.14 × 49 =
  11. 11.13 × 19 =
  12. 12.7 × 9 =
  13. 13.8 × 19 =
  14. 14.39 × 98 =
  15. 15.14 × 19 =
  16. 16.11 × 19 =
  17. 17.9 × 9 =
  18. 18.9 × 49 =
  19. 19.12 × 99 =
  20. 20.5 × 9 =
  21. 21.11 × 49 =
  22. 22.8 × 19 =
  23. 23.13 × 29 =
  24. 24.7 × 9 =
  25. 25.15 × 99 =
  26. 26.5 × 29 =
  27. 27.14 × 19 =
  28. 28.6 × 29 =
  29. 29.4 × 49 =
  30. 30.11 × 49 =
  31. 31.10 × 19 =
  32. 32.13 × 49 =
  33. 33.12 × 19 =
  34. 34.3 × 29 =
  35. 35.11 × 29 =
  36. 36.29 × 98 =
  37. 37.9 × 19 =
  38. 38.3 × 49 =
  39. 39.3 × 9 =
  40. 40.7 × 19 =

Answer key

  1. 116
  2. 36
  3. 72
  4. 2744
  5. 95
  6. 735
  7. 57
  8. 686
  9. 95
  10. 686
  11. 247
  12. 63
  13. 152
  14. 3822
  15. 266
  16. 209
  17. 81
  18. 441
  19. 1188
  20. 45
  21. 539
  22. 152
  23. 377
  24. 63
  25. 1485
  26. 145
  27. 266
  28. 174
  29. 196
  30. 539
  31. 190
  32. 637
  33. 228
  34. 87
  35. 319
  36. 2842
  37. 171
  38. 147
  39. 27
  40. 133

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