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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 824 · 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. 1.7 × 9 =
  2. 2.11 × 19 =
  3. 3.3 × 49 =
  4. 4.7 × 98 =
  5. 5.8 × 9 =
  6. 6.6 × 19 =
  7. 7.6 × 9 =
  8. 8.4 × 49 =
  9. 9.14 × 29 =
  10. 10.11 × 99 =
  11. 11.4 × 19 =
  12. 12.4 × 49 =
  13. 13.15 × 98 =
  14. 14.5 × 99 =
  15. 15.4 × 29 =
  16. 16.6 × 49 =
  17. 17.7 × 19 =
  18. 18.15 × 29 =
  19. 19.4 × 9 =
  20. 20.10 × 29 =
  21. 21.6 × 49 =
  22. 22.14 × 98 =
  23. 23.11 × 29 =
  24. 24.7 × 19 =
  25. 25.13 × 29 =
  26. 26.12 × 19 =
  27. 27.24 × 98 =
  28. 28.15 × 19 =
  29. 29.6 × 49 =
  30. 30.25 × 99 =
  31. 31.4 × 49 =
  32. 32.12 × 19 =
  33. 33.37 × 99 =
  34. 34.10 × 99 =
  35. 35.8 × 99 =
  36. 36.8 × 49 =
  37. 37.8 × 9 =
  38. 38.19 × 98 =
  39. 39.12 × 98 =
  40. 40.16 × 98 =

Answer key

  1. 63
  2. 209
  3. 147
  4. 686
  5. 72
  6. 114
  7. 54
  8. 196
  9. 406
  10. 1089
  11. 76
  12. 196
  13. 1470
  14. 495
  15. 116
  16. 294
  17. 133
  18. 435
  19. 36
  20. 290
  21. 294
  22. 1372
  23. 319
  24. 133
  25. 377
  26. 228
  27. 2352
  28. 285
  29. 294
  30. 2475
  31. 196
  32. 228
  33. 3663
  34. 990
  35. 792
  36. 392
  37. 72
  38. 1862
  39. 1176
  40. 1568

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