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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 497 · 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. 1.4 × 9 =
  2. 2.3 × 49 =
  3. 3.28 × 98 =
  4. 4.14 × 98 =
  5. 5.15 × 19 =
  6. 6.8 × 29 =
  7. 7.23 × 98 =
  8. 8.10 × 49 =
  9. 9.8 × 19 =
  10. 10.3 × 29 =
  11. 11.3 × 19 =
  12. 12.7 × 29 =
  13. 13.3 × 19 =
  14. 14.8 × 19 =
  15. 15.10 × 98 =
  16. 16.9 × 19 =
  17. 17.35 × 98 =
  18. 18.11 × 29 =
  19. 19.11 × 19 =
  20. 20.9 × 98 =
  21. 21.29 × 99 =
  22. 22.13 × 19 =
  23. 23.20 × 98 =
  24. 24.13 × 9 =
  25. 25.36 × 98 =
  26. 26.30 × 98 =
  27. 27.6 × 98 =
  28. 28.13 × 9 =
  29. 29.12 × 19 =
  30. 30.5 × 29 =
  31. 31.12 × 19 =
  32. 32.13 × 9 =
  33. 33.5 × 98 =
  34. 34.5 × 49 =
  35. 35.5 × 29 =
  36. 36.6 × 98 =
  37. 37.34 × 98 =
  38. 38.10 × 19 =
  39. 39.36 × 98 =
  40. 40.14 × 9 =

Answer key

  1. 36
  2. 147
  3. 2744
  4. 1372
  5. 285
  6. 232
  7. 2254
  8. 490
  9. 152
  10. 87
  11. 57
  12. 203
  13. 57
  14. 152
  15. 980
  16. 171
  17. 3430
  18. 319
  19. 209
  20. 882
  21. 2871
  22. 247
  23. 1960
  24. 117
  25. 3528
  26. 2940
  27. 588
  28. 117
  29. 228
  30. 145
  31. 228
  32. 117
  33. 490
  34. 245
  35. 145
  36. 588
  37. 3332
  38. 190
  39. 3528
  40. 126

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