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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 434 · 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. 1.6 × 19 =
  2. 2.3 × 49 =
  3. 3.15 × 99 =
  4. 4.22 × 98 =
  5. 5.35 × 99 =
  6. 6.14 × 99 =
  7. 7.11 × 29 =
  8. 8.14 × 9 =
  9. 9.12 × 49 =
  10. 10.12 × 49 =
  11. 11.8 × 19 =
  12. 12.13 × 29 =
  13. 13.14 × 99 =
  14. 14.9 × 99 =
  15. 15.13 × 98 =
  16. 16.11 × 49 =
  17. 17.25 × 98 =
  18. 18.11 × 9 =
  19. 19.3 × 98 =
  20. 20.30 × 98 =
  21. 21.3 × 19 =
  22. 22.11 × 9 =
  23. 23.15 × 9 =
  24. 24.3 × 99 =
  25. 25.9 × 9 =
  26. 26.9 × 9 =
  27. 27.16 × 98 =
  28. 28.6 × 29 =
  29. 29.22 × 98 =
  30. 30.3 × 49 =
  31. 31.5 × 9 =
  32. 32.3 × 99 =
  33. 33.8 × 19 =
  34. 34.4 × 29 =
  35. 35.14 × 9 =
  36. 36.12 × 98 =
  37. 37.8 × 9 =
  38. 38.6 × 9 =
  39. 39.13 × 29 =
  40. 40.4 × 29 =

Answer key

  1. 114
  2. 147
  3. 1485
  4. 2156
  5. 3465
  6. 1386
  7. 319
  8. 126
  9. 588
  10. 588
  11. 152
  12. 377
  13. 1386
  14. 891
  15. 1274
  16. 539
  17. 2450
  18. 99
  19. 294
  20. 2940
  21. 57
  22. 99
  23. 135
  24. 297
  25. 81
  26. 81
  27. 1568
  28. 174
  29. 2156
  30. 147
  31. 45
  32. 297
  33. 152
  34. 116
  35. 126
  36. 1176
  37. 72
  38. 54
  39. 377
  40. 116

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