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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 802 · 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. 1.8 × 99 =
  2. 2.5 × 9 =
  3. 3.5 × 98 =
  4. 4.11 × 29 =
  5. 5.5 × 9 =
  6. 6.14 × 29 =
  7. 7.5 × 49 =
  8. 8.10 × 9 =
  9. 9.7 × 49 =
  10. 10.5 × 49 =
  11. 11.15 × 19 =
  12. 12.7 × 9 =
  13. 13.12 × 98 =
  14. 14.30 × 98 =
  15. 15.6 × 99 =
  16. 16.10 × 49 =
  17. 17.12 × 29 =
  18. 18.8 × 19 =
  19. 19.12 × 49 =
  20. 20.32 × 99 =
  21. 21.10 × 19 =
  22. 22.15 × 29 =
  23. 23.4 × 19 =
  24. 24.5 × 19 =
  25. 25.3 × 29 =
  26. 26.15 × 49 =
  27. 27.4 × 98 =
  28. 28.4 × 49 =
  29. 29.13 × 29 =
  30. 30.25 × 99 =
  31. 31.4 × 99 =
  32. 32.8 × 9 =
  33. 33.11 × 9 =
  34. 34.13 × 98 =
  35. 35.11 × 9 =
  36. 36.4 × 19 =
  37. 37.6 × 19 =
  38. 38.8 × 19 =
  39. 39.14 × 29 =
  40. 40.15 × 49 =

Answer key

  1. 792
  2. 45
  3. 490
  4. 319
  5. 45
  6. 406
  7. 245
  8. 90
  9. 343
  10. 245
  11. 285
  12. 63
  13. 1176
  14. 2940
  15. 594
  16. 490
  17. 348
  18. 152
  19. 588
  20. 3168
  21. 190
  22. 435
  23. 76
  24. 95
  25. 87
  26. 735
  27. 392
  28. 196
  29. 377
  30. 2475
  31. 396
  32. 72
  33. 99
  34. 1274
  35. 99
  36. 76
  37. 114
  38. 152
  39. 406
  40. 735

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