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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 618 · 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. 1.12 × 19 =
  2. 2.12 × 19 =
  3. 3.10 × 98 =
  4. 4.11 × 19 =
  5. 5.6 × 19 =
  6. 6.17 × 99 =
  7. 7.34 × 99 =
  8. 8.10 × 99 =
  9. 9.5 × 9 =
  10. 10.5 × 19 =
  11. 11.15 × 9 =
  12. 12.39 × 98 =
  13. 13.8 × 99 =
  14. 14.4 × 19 =
  15. 15.34 × 98 =
  16. 16.4 × 19 =
  17. 17.5 × 9 =
  18. 18.8 × 19 =
  19. 19.5 × 29 =
  20. 20.16 × 98 =
  21. 21.14 × 19 =
  22. 22.13 × 49 =
  23. 23.7 × 9 =
  24. 24.38 × 99 =
  25. 25.11 × 99 =
  26. 26.18 × 98 =
  27. 27.13 × 29 =
  28. 28.15 × 49 =
  29. 29.9 × 49 =
  30. 30.18 × 98 =
  31. 31.7 × 49 =
  32. 32.13 × 9 =
  33. 33.7 × 29 =
  34. 34.4 × 98 =
  35. 35.26 × 99 =
  36. 36.9 × 19 =
  37. 37.3 × 9 =
  38. 38.12 × 19 =
  39. 39.10 × 49 =
  40. 40.9 × 49 =

Answer key

  1. 228
  2. 228
  3. 980
  4. 209
  5. 114
  6. 1683
  7. 3366
  8. 990
  9. 45
  10. 95
  11. 135
  12. 3822
  13. 792
  14. 76
  15. 3332
  16. 76
  17. 45
  18. 152
  19. 145
  20. 1568
  21. 266
  22. 637
  23. 63
  24. 3762
  25. 1089
  26. 1764
  27. 377
  28. 735
  29. 441
  30. 1764
  31. 343
  32. 117
  33. 203
  34. 392
  35. 2574
  36. 171
  37. 27
  38. 228
  39. 490
  40. 441

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