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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 690 · 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. 1.29 × 98 =
  2. 2.26 × 98 =
  3. 3.11 × 9 =
  4. 4.9 × 19 =
  5. 5.13 × 49 =
  6. 6.4 × 9 =
  7. 7.10 × 49 =
  8. 8.14 × 19 =
  9. 9.11 × 19 =
  10. 10.13 × 98 =
  11. 11.10 × 29 =
  12. 12.14 × 19 =
  13. 13.9 × 19 =
  14. 14.13 × 49 =
  15. 15.11 × 19 =
  16. 16.8 × 19 =
  17. 17.14 × 9 =
  18. 18.12 × 29 =
  19. 19.14 × 29 =
  20. 20.5 × 19 =
  21. 21.31 × 98 =
  22. 22.10 × 9 =
  23. 23.5 × 29 =
  24. 24.9 × 29 =
  25. 25.11 × 49 =
  26. 26.8 × 9 =
  27. 27.31 × 98 =
  28. 28.9 × 98 =
  29. 29.13 × 29 =
  30. 30.7 × 9 =
  31. 31.10 × 19 =
  32. 32.4 × 9 =
  33. 33.23 × 98 =
  34. 34.34 × 98 =
  35. 35.10 × 49 =
  36. 36.11 × 99 =
  37. 37.13 × 9 =
  38. 38.6 × 9 =
  39. 39.9 × 49 =
  40. 40.4 × 49 =

Answer key

  1. 2842
  2. 2548
  3. 99
  4. 171
  5. 637
  6. 36
  7. 490
  8. 266
  9. 209
  10. 1274
  11. 290
  12. 266
  13. 171
  14. 637
  15. 209
  16. 152
  17. 126
  18. 348
  19. 406
  20. 95
  21. 3038
  22. 90
  23. 145
  24. 261
  25. 539
  26. 72
  27. 3038
  28. 882
  29. 377
  30. 63
  31. 190
  32. 36
  33. 2254
  34. 3332
  35. 490
  36. 1089
  37. 117
  38. 54
  39. 441
  40. 196

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