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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 612 · 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. 1.40 × 98 =
  2. 2.21 × 99 =
  3. 3.7 × 29 =
  4. 4.12 × 49 =
  5. 5.14 × 99 =
  6. 6.16 × 98 =
  7. 7.5 × 19 =
  8. 8.3 × 29 =
  9. 9.15 × 29 =
  10. 10.11 × 9 =
  11. 11.29 × 98 =
  12. 12.10 × 98 =
  13. 13.7 × 9 =
  14. 14.6 × 49 =
  15. 15.11 × 9 =
  16. 16.4 × 99 =
  17. 17.36 × 98 =
  18. 18.3 × 9 =
  19. 19.14 × 9 =
  20. 20.8 × 9 =
  21. 21.21 × 99 =
  22. 22.5 × 49 =
  23. 23.23 × 98 =
  24. 24.4 × 19 =
  25. 25.12 × 99 =
  26. 26.8 × 29 =
  27. 27.18 × 99 =
  28. 28.32 × 99 =
  29. 29.12 × 98 =
  30. 30.4 × 19 =
  31. 31.11 × 19 =
  32. 32.13 × 49 =
  33. 33.4 × 49 =
  34. 34.11 × 49 =
  35. 35.5 × 29 =
  36. 36.32 × 99 =
  37. 37.3 × 9 =
  38. 38.34 × 98 =
  39. 39.13 × 49 =
  40. 40.3 × 49 =

Answer key

  1. 3920
  2. 2079
  3. 203
  4. 588
  5. 1386
  6. 1568
  7. 95
  8. 87
  9. 435
  10. 99
  11. 2842
  12. 980
  13. 63
  14. 294
  15. 99
  16. 396
  17. 3528
  18. 27
  19. 126
  20. 72
  21. 2079
  22. 245
  23. 2254
  24. 76
  25. 1188
  26. 232
  27. 1782
  28. 3168
  29. 1176
  30. 76
  31. 209
  32. 637
  33. 196
  34. 539
  35. 145
  36. 3168
  37. 27
  38. 3332
  39. 637
  40. 147

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