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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 839 · 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. 2.15 × 9 =
  3. 3.8 × 9 =
  4. 4.4 × 9 =
  5. 5.6 × 99 =
  6. 6.5 × 19 =
  7. 7.8 × 29 =
  8. 8.5 × 19 =
  9. 9.15 × 19 =
  10. 10.14 × 29 =
  11. 11.5 × 29 =
  12. 12.8 × 9 =
  13. 13.15 × 98 =
  14. 14.30 × 98 =
  15. 15.6 × 49 =
  16. 16.13 × 99 =
  17. 17.15 × 99 =
  18. 18.4 × 49 =
  19. 19.13 × 9 =
  20. 20.11 × 19 =
  21. 21.11 × 49 =
  22. 22.5 × 98 =
  23. 23.10 × 19 =
  24. 24.10 × 9 =
  25. 25.11 × 49 =
  26. 26.14 × 99 =
  27. 27.11 × 29 =
  28. 28.9 × 49 =
  29. 29.3 × 9 =
  30. 30.7 × 29 =
  31. 31.14 × 19 =
  32. 32.25 × 99 =
  33. 33.23 × 99 =
  34. 34.12 × 9 =
  35. 35.11 × 49 =
  36. 36.4 × 98 =
  37. 37.13 × 99 =
  38. 38.11 × 49 =
  39. 39.36 × 98 =
  40. 40.30 × 98 =

Answer key

  1. 63
  2. 135
  3. 72
  4. 36
  5. 594
  6. 95
  7. 232
  8. 95
  9. 285
  10. 406
  11. 145
  12. 72
  13. 1470
  14. 2940
  15. 294
  16. 1287
  17. 1485
  18. 196
  19. 117
  20. 209
  21. 539
  22. 490
  23. 190
  24. 90
  25. 539
  26. 1386
  27. 319
  28. 441
  29. 27
  30. 203
  31. 266
  32. 2475
  33. 2277
  34. 108
  35. 539
  36. 392
  37. 1287
  38. 539
  39. 3528
  40. 2940

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