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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 46 · 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. 1.17 × 99 =
  2. 2.13 × 29 =
  3. 3.9 × 9 =
  4. 4.32 × 99 =
  5. 5.15 × 19 =
  6. 6.9 × 9 =
  7. 7.7 × 98 =
  8. 8.17 × 98 =
  9. 9.11 × 19 =
  10. 10.17 × 99 =
  11. 11.11 × 19 =
  12. 12.5 × 29 =
  13. 13.13 × 9 =
  14. 14.11 × 29 =
  15. 15.9 × 99 =
  16. 16.11 × 9 =
  17. 17.12 × 19 =
  18. 18.23 × 98 =
  19. 19.4 × 29 =
  20. 20.4 × 49 =
  21. 21.14 × 19 =
  22. 22.17 × 99 =
  23. 23.4 × 19 =
  24. 24.8 × 9 =
  25. 25.5 × 49 =
  26. 26.15 × 99 =
  27. 27.8 × 29 =
  28. 28.3 × 9 =
  29. 29.37 × 98 =
  30. 30.11 × 49 =
  31. 31.5 × 99 =
  32. 32.6 × 19 =
  33. 33.11 × 99 =
  34. 34.4 × 99 =
  35. 35.3 × 19 =
  36. 36.4 × 19 =
  37. 37.15 × 19 =
  38. 38.12 × 19 =
  39. 39.34 × 99 =
  40. 40.3 × 19 =

Answer key

  1. 1683
  2. 377
  3. 81
  4. 3168
  5. 285
  6. 81
  7. 686
  8. 1666
  9. 209
  10. 1683
  11. 209
  12. 145
  13. 117
  14. 319
  15. 891
  16. 99
  17. 228
  18. 2254
  19. 116
  20. 196
  21. 266
  22. 1683
  23. 76
  24. 72
  25. 245
  26. 1485
  27. 232
  28. 27
  29. 3626
  30. 539
  31. 495
  32. 114
  33. 1089
  34. 396
  35. 57
  36. 76
  37. 285
  38. 228
  39. 3366
  40. 57

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