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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 324 · 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 × 9 =
  2. 2.5 × 29 =
  3. 3.14 × 49 =
  4. 4.9 × 19 =
  5. 5.34 × 98 =
  6. 6.15 × 19 =
  7. 7.31 × 99 =
  8. 8.14 × 49 =
  9. 9.9 × 9 =
  10. 10.8 × 9 =
  11. 11.3 × 9 =
  12. 12.11 × 19 =
  13. 13.5 × 9 =
  14. 14.32 × 98 =
  15. 15.3 × 19 =
  16. 16.6 × 9 =
  17. 17.14 × 99 =
  18. 18.18 × 98 =
  19. 19.10 × 49 =
  20. 20.14 × 19 =
  21. 21.6 × 29 =
  22. 22.7 × 98 =
  23. 23.12 × 19 =
  24. 24.34 × 98 =
  25. 25.16 × 98 =
  26. 26.14 × 99 =
  27. 27.14 × 9 =
  28. 28.5 × 49 =
  29. 29.11 × 19 =
  30. 30.4 × 98 =
  31. 31.8 × 19 =
  32. 32.21 × 98 =
  33. 33.4 × 49 =
  34. 34.4 × 9 =
  35. 35.3 × 9 =
  36. 36.39 × 98 =
  37. 37.6 × 29 =
  38. 38.4 × 19 =
  39. 39.15 × 9 =
  40. 40.12 × 19 =

Answer key

  1. 108
  2. 145
  3. 686
  4. 171
  5. 3332
  6. 285
  7. 3069
  8. 686
  9. 81
  10. 72
  11. 27
  12. 209
  13. 45
  14. 3136
  15. 57
  16. 54
  17. 1386
  18. 1764
  19. 490
  20. 266
  21. 174
  22. 686
  23. 228
  24. 3332
  25. 1568
  26. 1386
  27. 126
  28. 245
  29. 209
  30. 392
  31. 152
  32. 2058
  33. 196
  34. 36
  35. 27
  36. 3822
  37. 174
  38. 76
  39. 135
  40. 228

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