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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 329 · 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. 1.9 × 9 =
  2. 2.4 × 19 =
  3. 3.15 × 19 =
  4. 4.13 × 99 =
  5. 5.8 × 49 =
  6. 6.11 × 98 =
  7. 7.11 × 29 =
  8. 8.16 × 98 =
  9. 9.4 × 29 =
  10. 10.4 × 29 =
  11. 11.10 × 49 =
  12. 12.7 × 29 =
  13. 13.10 × 98 =
  14. 14.3 × 49 =
  15. 15.37 × 98 =
  16. 16.26 × 98 =
  17. 17.7 × 49 =
  18. 18.11 × 9 =
  19. 19.15 × 19 =
  20. 20.36 × 98 =
  21. 21.4 × 49 =
  22. 22.21 × 99 =
  23. 23.29 × 98 =
  24. 24.9 × 49 =
  25. 25.36 × 98 =
  26. 26.9 × 98 =
  27. 27.27 × 99 =
  28. 28.14 × 49 =
  29. 29.6 × 49 =
  30. 30.8 × 19 =
  31. 31.4 × 9 =
  32. 32.8 × 19 =
  33. 33.14 × 9 =
  34. 34.13 × 9 =
  35. 35.5 × 49 =
  36. 36.10 × 98 =
  37. 37.7 × 19 =
  38. 38.7 × 9 =
  39. 39.3 × 19 =
  40. 40.8 × 19 =

Answer key

  1. 81
  2. 76
  3. 285
  4. 1287
  5. 392
  6. 1078
  7. 319
  8. 1568
  9. 116
  10. 116
  11. 490
  12. 203
  13. 980
  14. 147
  15. 3626
  16. 2548
  17. 343
  18. 99
  19. 285
  20. 3528
  21. 196
  22. 2079
  23. 2842
  24. 441
  25. 3528
  26. 882
  27. 2673
  28. 686
  29. 294
  30. 152
  31. 36
  32. 152
  33. 126
  34. 117
  35. 245
  36. 980
  37. 133
  38. 63
  39. 57
  40. 152

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