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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 999 · 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. 2.12 × 19 =
  3. 3.14 × 19 =
  4. 4.11 × 9 =
  5. 5.10 × 9 =
  6. 6.3 × 49 =
  7. 7.14 × 9 =
  8. 8.10 × 99 =
  9. 9.4 × 49 =
  10. 10.11 × 49 =
  11. 11.10 × 19 =
  12. 12.14 × 49 =
  13. 13.9 × 98 =
  14. 14.7 × 19 =
  15. 15.9 × 29 =
  16. 16.7 × 19 =
  17. 17.9 × 9 =
  18. 18.3 × 29 =
  19. 19.38 × 99 =
  20. 20.13 × 49 =
  21. 21.9 × 98 =
  22. 22.12 × 9 =
  23. 23.21 × 99 =
  24. 24.13 × 99 =
  25. 25.11 × 98 =
  26. 26.8 × 29 =
  27. 27.5 × 29 =
  28. 28.14 × 49 =
  29. 29.24 × 99 =
  30. 30.34 × 99 =
  31. 31.14 × 98 =
  32. 32.13 × 99 =
  33. 33.4 × 49 =
  34. 34.4 × 9 =
  35. 35.26 × 99 =
  36. 36.7 × 9 =
  37. 37.6 × 29 =
  38. 38.15 × 19 =
  39. 39.14 × 29 =
  40. 40.11 × 9 =

Answer key

  1. 1862
  2. 228
  3. 266
  4. 99
  5. 90
  6. 147
  7. 126
  8. 990
  9. 196
  10. 539
  11. 190
  12. 686
  13. 882
  14. 133
  15. 261
  16. 133
  17. 81
  18. 87
  19. 3762
  20. 637
  21. 882
  22. 108
  23. 2079
  24. 1287
  25. 1078
  26. 232
  27. 145
  28. 686
  29. 2376
  30. 3366
  31. 1372
  32. 1287
  33. 196
  34. 36
  35. 2574
  36. 63
  37. 174
  38. 285
  39. 406
  40. 99

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