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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 244 · 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. 1.5 × 29 =
  2. 2.9 × 9 =
  3. 3.15 × 99 =
  4. 4.10 × 19 =
  5. 5.8 × 49 =
  6. 6.12 × 29 =
  7. 7.7 × 9 =
  8. 8.6 × 99 =
  9. 9.10 × 19 =
  10. 10.6 × 49 =
  11. 11.32 × 99 =
  12. 12.12 × 9 =
  13. 13.4 × 49 =
  14. 14.15 × 49 =
  15. 15.14 × 19 =
  16. 16.12 × 19 =
  17. 17.23 × 98 =
  18. 18.5 × 9 =
  19. 19.29 × 98 =
  20. 20.9 × 49 =
  21. 21.7 × 19 =
  22. 22.5 × 9 =
  23. 23.3 × 19 =
  24. 24.14 × 19 =
  25. 25.13 × 9 =
  26. 26.5 × 49 =
  27. 27.5 × 19 =
  28. 28.17 × 98 =
  29. 29.5 × 9 =
  30. 30.15 × 9 =
  31. 31.40 × 99 =
  32. 32.5 × 49 =
  33. 33.13 × 99 =
  34. 34.7 × 49 =
  35. 35.33 × 98 =
  36. 36.10 × 19 =
  37. 37.6 × 29 =
  38. 38.6 × 9 =
  39. 39.3 × 9 =
  40. 40.4 × 49 =

Answer key

  1. 145
  2. 81
  3. 1485
  4. 190
  5. 392
  6. 348
  7. 63
  8. 594
  9. 190
  10. 294
  11. 3168
  12. 108
  13. 196
  14. 735
  15. 266
  16. 228
  17. 2254
  18. 45
  19. 2842
  20. 441
  21. 133
  22. 45
  23. 57
  24. 266
  25. 117
  26. 245
  27. 95
  28. 1666
  29. 45
  30. 135
  31. 3960
  32. 245
  33. 1287
  34. 343
  35. 3234
  36. 190
  37. 174
  38. 54
  39. 27
  40. 196

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