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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 164 · 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 × 99 =
  2. 2.12 × 19 =
  3. 3.11 × 19 =
  4. 4.13 × 9 =
  5. 5.29 × 98 =
  6. 6.13 × 98 =
  7. 7.19 × 99 =
  8. 8.9 × 29 =
  9. 9.8 × 99 =
  10. 10.31 × 98 =
  11. 11.39 × 98 =
  12. 12.15 × 9 =
  13. 13.12 × 29 =
  14. 14.13 × 29 =
  15. 15.11 × 29 =
  16. 16.11 × 29 =
  17. 17.10 × 29 =
  18. 18.6 × 49 =
  19. 19.8 × 29 =
  20. 20.4 × 9 =
  21. 21.15 × 98 =
  22. 22.4 × 99 =
  23. 23.4 × 9 =
  24. 24.23 × 99 =
  25. 25.4 × 29 =
  26. 26.5 × 29 =
  27. 27.31 × 98 =
  28. 28.5 × 9 =
  29. 29.11 × 19 =
  30. 30.7 × 29 =
  31. 31.5 × 29 =
  32. 32.6 × 19 =
  33. 33.26 × 99 =
  34. 34.4 × 19 =
  35. 35.11 × 49 =
  36. 36.10 × 49 =
  37. 37.33 × 98 =
  38. 38.13 × 49 =
  39. 39.14 × 9 =
  40. 40.13 × 9 =

Answer key

  1. 1287
  2. 228
  3. 209
  4. 117
  5. 2842
  6. 1274
  7. 1881
  8. 261
  9. 792
  10. 3038
  11. 3822
  12. 135
  13. 348
  14. 377
  15. 319
  16. 319
  17. 290
  18. 294
  19. 232
  20. 36
  21. 1470
  22. 396
  23. 36
  24. 2277
  25. 116
  26. 145
  27. 3038
  28. 45
  29. 209
  30. 203
  31. 145
  32. 114
  33. 2574
  34. 76
  35. 539
  36. 490
  37. 3234
  38. 637
  39. 126
  40. 117

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