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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 3 · 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. 1.3 × 9 =
  2. 2.7 × 49 =
  3. 3.12 × 19 =
  4. 4.27 × 99 =
  5. 5.5 × 29 =
  6. 6.15 × 98 =
  7. 7.12 × 19 =
  8. 8.8 × 19 =
  9. 9.15 × 98 =
  10. 10.30 × 99 =
  11. 11.6 × 19 =
  12. 12.5 × 99 =
  13. 13.14 × 19 =
  14. 14.9 × 19 =
  15. 15.7 × 98 =
  16. 16.15 × 49 =
  17. 17.4 × 29 =
  18. 18.5 × 19 =
  19. 19.11 × 9 =
  20. 20.7 × 9 =
  21. 21.8 × 19 =
  22. 22.4 × 9 =
  23. 23.4 × 9 =
  24. 24.6 × 49 =
  25. 25.3 × 9 =
  26. 26.20 × 99 =
  27. 27.13 × 9 =
  28. 28.15 × 9 =
  29. 29.11 × 29 =
  30. 30.30 × 98 =
  31. 31.27 × 99 =
  32. 32.4 × 9 =
  33. 33.13 × 19 =
  34. 34.3 × 49 =
  35. 35.10 × 49 =
  36. 36.6 × 29 =
  37. 37.15 × 29 =
  38. 38.3 × 99 =
  39. 39.5 × 49 =
  40. 40.3 × 19 =

Answer key

  1. 27
  2. 343
  3. 228
  4. 2673
  5. 145
  6. 1470
  7. 228
  8. 152
  9. 1470
  10. 2970
  11. 114
  12. 495
  13. 266
  14. 171
  15. 686
  16. 735
  17. 116
  18. 95
  19. 99
  20. 63
  21. 152
  22. 36
  23. 36
  24. 294
  25. 27
  26. 1980
  27. 117
  28. 135
  29. 319
  30. 2940
  31. 2673
  32. 36
  33. 247
  34. 147
  35. 490
  36. 174
  37. 435
  38. 297
  39. 245
  40. 57

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