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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 212 · 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. 1.13 × 99 =
  2. 2.12 × 99 =
  3. 3.19 × 98 =
  4. 4.10 × 9 =
  5. 5.14 × 9 =
  6. 6.40 × 99 =
  7. 7.3 × 49 =
  8. 8.8 × 49 =
  9. 9.4 × 98 =
  10. 10.15 × 29 =
  11. 11.12 × 98 =
  12. 12.35 × 98 =
  13. 13.8 × 98 =
  14. 14.32 × 98 =
  15. 15.14 × 99 =
  16. 16.9 × 9 =
  17. 17.20 × 98 =
  18. 18.4 × 49 =
  19. 19.11 × 9 =
  20. 20.4 × 49 =
  21. 21.11 × 49 =
  22. 22.5 × 19 =
  23. 23.5 × 49 =
  24. 24.30 × 98 =
  25. 25.6 × 19 =
  26. 26.12 × 19 =
  27. 27.7 × 19 =
  28. 28.7 × 19 =
  29. 29.3 × 19 =
  30. 30.9 × 29 =
  31. 31.13 × 9 =
  32. 32.12 × 98 =
  33. 33.12 × 29 =
  34. 34.7 × 99 =
  35. 35.6 × 49 =
  36. 36.11 × 9 =
  37. 37.33 × 99 =
  38. 38.12 × 9 =
  39. 39.6 × 29 =
  40. 40.9 × 19 =

Answer key

  1. 1287
  2. 1188
  3. 1862
  4. 90
  5. 126
  6. 3960
  7. 147
  8. 392
  9. 392
  10. 435
  11. 1176
  12. 3430
  13. 784
  14. 3136
  15. 1386
  16. 81
  17. 1960
  18. 196
  19. 99
  20. 196
  21. 539
  22. 95
  23. 245
  24. 2940
  25. 114
  26. 228
  27. 133
  28. 133
  29. 57
  30. 261
  31. 117
  32. 1176
  33. 348
  34. 693
  35. 294
  36. 99
  37. 3267
  38. 108
  39. 174
  40. 171

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