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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 354 · 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. 1.19 × 98 =
  2. 2.4 × 29 =
  3. 3.20 × 99 =
  4. 4.15 × 99 =
  5. 5.13 × 9 =
  6. 6.40 × 99 =
  7. 7.32 × 98 =
  8. 8.14 × 99 =
  9. 9.3 × 29 =
  10. 10.13 × 9 =
  11. 11.11 × 99 =
  12. 12.11 × 49 =
  13. 13.5 × 49 =
  14. 14.7 × 9 =
  15. 15.5 × 19 =
  16. 16.7 × 29 =
  17. 17.10 × 49 =
  18. 18.4 × 9 =
  19. 19.3 × 49 =
  20. 20.36 × 98 =
  21. 21.4 × 49 =
  22. 22.11 × 49 =
  23. 23.5 × 29 =
  24. 24.12 × 29 =
  25. 25.14 × 29 =
  26. 26.20 × 99 =
  27. 27.4 × 99 =
  28. 28.22 × 98 =
  29. 29.11 × 49 =
  30. 30.38 × 99 =
  31. 31.12 × 98 =
  32. 32.9 × 49 =
  33. 33.5 × 29 =
  34. 34.21 × 99 =
  35. 35.6 × 9 =
  36. 36.3 × 19 =
  37. 37.30 × 98 =
  38. 38.32 × 99 =
  39. 39.6 × 99 =
  40. 40.5 × 98 =

Answer key

  1. 1862
  2. 116
  3. 1980
  4. 1485
  5. 117
  6. 3960
  7. 3136
  8. 1386
  9. 87
  10. 117
  11. 1089
  12. 539
  13. 245
  14. 63
  15. 95
  16. 203
  17. 490
  18. 36
  19. 147
  20. 3528
  21. 196
  22. 539
  23. 145
  24. 348
  25. 406
  26. 1980
  27. 396
  28. 2156
  29. 539
  30. 3762
  31. 1176
  32. 441
  33. 145
  34. 2079
  35. 54
  36. 57
  37. 2940
  38. 3168
  39. 594
  40. 490

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