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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 355 · 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. 1.6 × 9 =
  2. 2.14 × 9 =
  3. 3.3 × 9 =
  4. 4.8 × 9 =
  5. 5.8 × 9 =
  6. 6.24 × 99 =
  7. 7.22 × 99 =
  8. 8.10 × 19 =
  9. 9.6 × 29 =
  10. 10.9 × 9 =
  11. 11.9 × 49 =
  12. 12.11 × 99 =
  13. 13.30 × 98 =
  14. 14.10 × 49 =
  15. 15.3 × 29 =
  16. 16.32 × 99 =
  17. 17.3 × 99 =
  18. 18.8 × 99 =
  19. 19.7 × 98 =
  20. 20.15 × 9 =
  21. 21.7 × 9 =
  22. 22.13 × 19 =
  23. 23.10 × 9 =
  24. 24.15 × 9 =
  25. 25.10 × 29 =
  26. 26.14 × 29 =
  27. 27.13 × 19 =
  28. 28.22 × 98 =
  29. 29.14 × 29 =
  30. 30.7 × 49 =
  31. 31.15 × 19 =
  32. 32.4 × 19 =
  33. 33.21 × 99 =
  34. 34.11 × 9 =
  35. 35.12 × 19 =
  36. 36.13 × 9 =
  37. 37.10 × 29 =
  38. 38.14 × 9 =
  39. 39.14 × 49 =
  40. 40.11 × 9 =

Answer key

  1. 54
  2. 126
  3. 27
  4. 72
  5. 72
  6. 2376
  7. 2178
  8. 190
  9. 174
  10. 81
  11. 441
  12. 1089
  13. 2940
  14. 490
  15. 87
  16. 3168
  17. 297
  18. 792
  19. 686
  20. 135
  21. 63
  22. 247
  23. 90
  24. 135
  25. 290
  26. 406
  27. 247
  28. 2156
  29. 406
  30. 343
  31. 285
  32. 76
  33. 2079
  34. 99
  35. 228
  36. 117
  37. 290
  38. 126
  39. 686
  40. 99

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