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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 666 · 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. 2.3 × 9 =
  3. 3.6 × 9 =
  4. 4.9 × 49 =
  5. 5.8 × 99 =
  6. 6.31 × 99 =
  7. 7.10 × 49 =
  8. 8.8 × 19 =
  9. 9.23 × 99 =
  10. 10.12 × 19 =
  11. 11.12 × 99 =
  12. 12.7 × 19 =
  13. 13.8 × 49 =
  14. 14.9 × 19 =
  15. 15.11 × 98 =
  16. 16.15 × 98 =
  17. 17.13 × 9 =
  18. 18.30 × 98 =
  19. 19.10 × 29 =
  20. 20.6 × 9 =
  21. 21.6 × 19 =
  22. 22.9 × 29 =
  23. 23.13 × 9 =
  24. 24.12 × 49 =
  25. 25.15 × 49 =
  26. 26.11 × 49 =
  27. 27.12 × 9 =
  28. 28.15 × 19 =
  29. 29.11 × 98 =
  30. 30.19 × 98 =
  31. 31.38 × 99 =
  32. 32.18 × 98 =
  33. 33.34 × 99 =
  34. 34.11 × 49 =
  35. 35.7 × 9 =
  36. 36.11 × 9 =
  37. 37.10 × 19 =
  38. 38.13 × 19 =
  39. 39.15 × 9 =
  40. 40.5 × 9 =

Answer key

  1. 228
  2. 27
  3. 54
  4. 441
  5. 792
  6. 3069
  7. 490
  8. 152
  9. 2277
  10. 228
  11. 1188
  12. 133
  13. 392
  14. 171
  15. 1078
  16. 1470
  17. 117
  18. 2940
  19. 290
  20. 54
  21. 114
  22. 261
  23. 117
  24. 588
  25. 735
  26. 539
  27. 108
  28. 285
  29. 1078
  30. 1862
  31. 3762
  32. 1764
  33. 3366
  34. 539
  35. 63
  36. 99
  37. 190
  38. 247
  39. 135
  40. 45

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