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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 982 · 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. 1.14 × 98 =
  2. 2.9 × 29 =
  3. 3.7 × 9 =
  4. 4.13 × 49 =
  5. 5.4 × 29 =
  6. 6.12 × 98 =
  7. 7.4 × 19 =
  8. 8.35 × 98 =
  9. 9.15 × 49 =
  10. 10.21 × 99 =
  11. 11.17 × 98 =
  12. 12.9 × 9 =
  13. 13.29 × 98 =
  14. 14.8 × 29 =
  15. 15.13 × 29 =
  16. 16.12 × 29 =
  17. 17.39 × 99 =
  18. 18.3 × 99 =
  19. 19.3 × 99 =
  20. 20.6 × 9 =
  21. 21.14 × 19 =
  22. 22.31 × 98 =
  23. 23.13 × 9 =
  24. 24.8 × 19 =
  25. 25.40 × 99 =
  26. 26.15 × 49 =
  27. 27.7 × 19 =
  28. 28.14 × 9 =
  29. 29.38 × 99 =
  30. 30.14 × 19 =
  31. 31.34 × 99 =
  32. 32.39 × 98 =
  33. 33.34 × 98 =
  34. 34.5 × 29 =
  35. 35.12 × 19 =
  36. 36.5 × 19 =
  37. 37.10 × 29 =
  38. 38.8 × 19 =
  39. 39.9 × 19 =
  40. 40.17 × 98 =

Answer key

  1. 1372
  2. 261
  3. 63
  4. 637
  5. 116
  6. 1176
  7. 76
  8. 3430
  9. 735
  10. 2079
  11. 1666
  12. 81
  13. 2842
  14. 232
  15. 377
  16. 348
  17. 3861
  18. 297
  19. 297
  20. 54
  21. 266
  22. 3038
  23. 117
  24. 152
  25. 3960
  26. 735
  27. 133
  28. 126
  29. 3762
  30. 266
  31. 3366
  32. 3822
  33. 3332
  34. 145
  35. 228
  36. 95
  37. 290
  38. 152
  39. 171
  40. 1666

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