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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 5 · 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. 1.19 × 98 =
  2. 2.7 × 19 =
  3. 3.12 × 19 =
  4. 4.9 × 19 =
  5. 5.4 × 99 =
  6. 6.3 × 9 =
  7. 7.3 × 9 =
  8. 8.31 × 99 =
  9. 9.4 × 99 =
  10. 10.15 × 9 =
  11. 11.23 × 99 =
  12. 12.15 × 19 =
  13. 13.15 × 49 =
  14. 14.6 × 9 =
  15. 15.8 × 49 =
  16. 16.31 × 99 =
  17. 17.6 × 9 =
  18. 18.25 × 98 =
  19. 19.6 × 19 =
  20. 20.9 × 29 =
  21. 21.9 × 9 =
  22. 22.12 × 19 =
  23. 23.3 × 99 =
  24. 24.25 × 99 =
  25. 25.23 × 98 =
  26. 26.19 × 98 =
  27. 27.11 × 19 =
  28. 28.36 × 99 =
  29. 29.21 × 99 =
  30. 30.14 × 98 =
  31. 31.4 × 29 =
  32. 32.6 × 49 =
  33. 33.28 × 99 =
  34. 34.5 × 19 =
  35. 35.6 × 29 =
  36. 36.6 × 9 =
  37. 37.8 × 49 =
  38. 38.9 × 29 =
  39. 39.5 × 98 =
  40. 40.7 × 49 =

Answer key

  1. 1862
  2. 133
  3. 228
  4. 171
  5. 396
  6. 27
  7. 27
  8. 3069
  9. 396
  10. 135
  11. 2277
  12. 285
  13. 735
  14. 54
  15. 392
  16. 3069
  17. 54
  18. 2450
  19. 114
  20. 261
  21. 81
  22. 228
  23. 297
  24. 2475
  25. 2254
  26. 1862
  27. 209
  28. 3564
  29. 2079
  30. 1372
  31. 116
  32. 294
  33. 2772
  34. 95
  35. 174
  36. 54
  37. 392
  38. 261
  39. 490
  40. 343

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