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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 521 · 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. 1.9 × 19 =
  2. 2.14 × 19 =
  3. 3.15 × 9 =
  4. 4.5 × 29 =
  5. 5.7 × 9 =
  6. 6.7 × 29 =
  7. 7.33 × 99 =
  8. 8.6 × 9 =
  9. 9.22 × 99 =
  10. 10.14 × 49 =
  11. 11.24 × 99 =
  12. 12.32 × 99 =
  13. 13.7 × 29 =
  14. 14.5 × 49 =
  15. 15.13 × 9 =
  16. 16.10 × 49 =
  17. 17.6 × 19 =
  18. 18.10 × 29 =
  19. 19.12 × 19 =
  20. 20.11 × 99 =
  21. 21.5 × 99 =
  22. 22.7 × 19 =
  23. 23.36 × 99 =
  24. 24.14 × 98 =
  25. 25.3 × 29 =
  26. 26.15 × 29 =
  27. 27.6 × 9 =
  28. 28.13 × 29 =
  29. 29.6 × 29 =
  30. 30.9 × 19 =
  31. 31.14 × 9 =
  32. 32.5 × 49 =
  33. 33.25 × 99 =
  34. 34.3 × 19 =
  35. 35.6 × 99 =
  36. 36.28 × 98 =
  37. 37.24 × 99 =
  38. 38.23 × 99 =
  39. 39.8 × 9 =
  40. 40.29 × 99 =

Answer key

  1. 171
  2. 266
  3. 135
  4. 145
  5. 63
  6. 203
  7. 3267
  8. 54
  9. 2178
  10. 686
  11. 2376
  12. 3168
  13. 203
  14. 245
  15. 117
  16. 490
  17. 114
  18. 290
  19. 228
  20. 1089
  21. 495
  22. 133
  23. 3564
  24. 1372
  25. 87
  26. 435
  27. 54
  28. 377
  29. 174
  30. 171
  31. 126
  32. 245
  33. 2475
  34. 57
  35. 594
  36. 2744
  37. 2376
  38. 2277
  39. 72
  40. 2871

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