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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 47 · 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. 1.28 × 99 =
  2. 2.5 × 99 =
  3. 3.8 × 29 =
  4. 4.14 × 49 =
  5. 5.15 × 19 =
  6. 6.8 × 9 =
  7. 7.6 × 19 =
  8. 8.6 × 29 =
  9. 9.34 × 98 =
  10. 10.7 × 9 =
  11. 11.13 × 9 =
  12. 12.13 × 19 =
  13. 13.7 × 29 =
  14. 14.4 × 29 =
  15. 15.10 × 29 =
  16. 16.6 × 19 =
  17. 17.20 × 99 =
  18. 18.13 × 19 =
  19. 19.33 × 98 =
  20. 20.14 × 49 =
  21. 21.14 × 49 =
  22. 22.22 × 98 =
  23. 23.5 × 9 =
  24. 24.13 × 29 =
  25. 25.12 × 19 =
  26. 26.4 × 49 =
  27. 27.15 × 29 =
  28. 28.14 × 9 =
  29. 29.15 × 99 =
  30. 30.12 × 29 =
  31. 31.27 × 99 =
  32. 32.15 × 49 =
  33. 33.11 × 29 =
  34. 34.37 × 99 =
  35. 35.6 × 19 =
  36. 36.8 × 9 =
  37. 37.4 × 29 =
  38. 38.29 × 98 =
  39. 39.8 × 19 =
  40. 40.12 × 9 =

Answer key

  1. 2772
  2. 495
  3. 232
  4. 686
  5. 285
  6. 72
  7. 114
  8. 174
  9. 3332
  10. 63
  11. 117
  12. 247
  13. 203
  14. 116
  15. 290
  16. 114
  17. 1980
  18. 247
  19. 3234
  20. 686
  21. 686
  22. 2156
  23. 45
  24. 377
  25. 228
  26. 196
  27. 435
  28. 126
  29. 1485
  30. 348
  31. 2673
  32. 735
  33. 319
  34. 3663
  35. 114
  36. 72
  37. 116
  38. 2842
  39. 152
  40. 108

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