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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 582 · 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 × 49 =
  2. 2.8 × 19 =
  3. 3.5 × 29 =
  4. 4.13 × 29 =
  5. 5.9 × 19 =
  6. 6.11 × 29 =
  7. 7.6 × 29 =
  8. 8.3 × 9 =
  9. 9.15 × 98 =
  10. 10.14 × 9 =
  11. 11.13 × 19 =
  12. 12.6 × 9 =
  13. 13.10 × 49 =
  14. 14.7 × 49 =
  15. 15.7 × 9 =
  16. 16.10 × 29 =
  17. 17.13 × 29 =
  18. 18.34 × 98 =
  19. 19.9 × 49 =
  20. 20.5 × 19 =
  21. 21.7 × 29 =
  22. 22.6 × 29 =
  23. 23.15 × 19 =
  24. 24.3 × 29 =
  25. 25.7 × 99 =
  26. 26.8 × 29 =
  27. 27.5 × 29 =
  28. 28.12 × 29 =
  29. 29.9 × 19 =
  30. 30.12 × 9 =
  31. 31.15 × 9 =
  32. 32.7 × 9 =
  33. 33.4 × 29 =
  34. 34.13 × 29 =
  35. 35.12 × 99 =
  36. 36.26 × 99 =
  37. 37.11 × 29 =
  38. 38.27 × 98 =
  39. 39.6 × 9 =
  40. 40.12 × 19 =

Answer key

  1. 441
  2. 152
  3. 145
  4. 377
  5. 171
  6. 319
  7. 174
  8. 27
  9. 1470
  10. 126
  11. 247
  12. 54
  13. 490
  14. 343
  15. 63
  16. 290
  17. 377
  18. 3332
  19. 441
  20. 95
  21. 203
  22. 174
  23. 285
  24. 87
  25. 693
  26. 232
  27. 145
  28. 348
  29. 171
  30. 108
  31. 135
  32. 63
  33. 116
  34. 377
  35. 1188
  36. 2574
  37. 319
  38. 2646
  39. 54
  40. 228

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