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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 315 · 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. 1.9 × 9 =
  2. 2.22 × 99 =
  3. 3.11 × 19 =
  4. 4.5 × 99 =
  5. 5.12 × 9 =
  6. 6.32 × 98 =
  7. 7.9 × 49 =
  8. 8.6 × 29 =
  9. 9.10 × 29 =
  10. 10.12 × 98 =
  11. 11.27 × 98 =
  12. 12.10 × 49 =
  13. 13.10 × 98 =
  14. 14.10 × 99 =
  15. 15.9 × 19 =
  16. 16.5 × 9 =
  17. 17.15 × 19 =
  18. 18.7 × 49 =
  19. 19.12 × 19 =
  20. 20.10 × 49 =
  21. 21.12 × 99 =
  22. 22.6 × 9 =
  23. 23.11 × 9 =
  24. 24.4 × 19 =
  25. 25.8 × 49 =
  26. 26.11 × 9 =
  27. 27.8 × 9 =
  28. 28.13 × 9 =
  29. 29.13 × 99 =
  30. 30.5 × 19 =
  31. 31.36 × 99 =
  32. 32.4 × 49 =
  33. 33.9 × 19 =
  34. 34.8 × 29 =
  35. 35.5 × 49 =
  36. 36.3 × 9 =
  37. 37.34 × 98 =
  38. 38.12 × 98 =
  39. 39.14 × 49 =
  40. 40.12 × 29 =

Answer key

  1. 81
  2. 2178
  3. 209
  4. 495
  5. 108
  6. 3136
  7. 441
  8. 174
  9. 290
  10. 1176
  11. 2646
  12. 490
  13. 980
  14. 990
  15. 171
  16. 45
  17. 285
  18. 343
  19. 228
  20. 490
  21. 1188
  22. 54
  23. 99
  24. 76
  25. 392
  26. 99
  27. 72
  28. 117
  29. 1287
  30. 95
  31. 3564
  32. 196
  33. 171
  34. 232
  35. 245
  36. 27
  37. 3332
  38. 1176
  39. 686
  40. 348

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