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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 513 · 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. 1.12 × 99 =
  2. 2.6 × 19 =
  3. 3.10 × 49 =
  4. 4.11 × 49 =
  5. 5.3 × 99 =
  6. 6.14 × 98 =
  7. 7.14 × 9 =
  8. 8.7 × 49 =
  9. 9.8 × 99 =
  10. 10.13 × 19 =
  11. 11.6 × 19 =
  12. 12.9 × 9 =
  13. 13.12 × 9 =
  14. 14.6 × 29 =
  15. 15.31 × 98 =
  16. 16.20 × 98 =
  17. 17.5 × 9 =
  18. 18.7 × 29 =
  19. 19.10 × 49 =
  20. 20.12 × 99 =
  21. 21.35 × 99 =
  22. 22.10 × 19 =
  23. 23.5 × 49 =
  24. 24.11 × 19 =
  25. 25.4 × 49 =
  26. 26.5 × 29 =
  27. 27.33 × 98 =
  28. 28.4 × 29 =
  29. 29.5 × 29 =
  30. 30.8 × 99 =
  31. 31.5 × 19 =
  32. 32.4 × 99 =
  33. 33.12 × 99 =
  34. 34.11 × 29 =
  35. 35.28 × 98 =
  36. 36.12 × 19 =
  37. 37.10 × 49 =
  38. 38.18 × 99 =
  39. 39.14 × 29 =
  40. 40.23 × 98 =

Answer key

  1. 1188
  2. 114
  3. 490
  4. 539
  5. 297
  6. 1372
  7. 126
  8. 343
  9. 792
  10. 247
  11. 114
  12. 81
  13. 108
  14. 174
  15. 3038
  16. 1960
  17. 45
  18. 203
  19. 490
  20. 1188
  21. 3465
  22. 190
  23. 245
  24. 209
  25. 196
  26. 145
  27. 3234
  28. 116
  29. 145
  30. 792
  31. 95
  32. 396
  33. 1188
  34. 319
  35. 2744
  36. 228
  37. 490
  38. 1782
  39. 406
  40. 2254

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