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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 236 · 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. 1.10 × 49 =
  2. 2.11 × 98 =
  3. 3.6 × 29 =
  4. 4.7 × 19 =
  5. 5.5 × 29 =
  6. 6.30 × 98 =
  7. 7.5 × 9 =
  8. 8.13 × 29 =
  9. 9.6 × 9 =
  10. 10.11 × 49 =
  11. 11.13 × 49 =
  12. 12.13 × 29 =
  13. 13.30 × 98 =
  14. 14.15 × 98 =
  15. 15.12 × 9 =
  16. 16.4 × 9 =
  17. 17.14 × 29 =
  18. 18.4 × 29 =
  19. 19.13 × 29 =
  20. 20.4 × 49 =
  21. 21.7 × 29 =
  22. 22.11 × 29 =
  23. 23.11 × 9 =
  24. 24.12 × 9 =
  25. 25.13 × 29 =
  26. 26.5 × 19 =
  27. 27.6 × 29 =
  28. 28.7 × 9 =
  29. 29.5 × 19 =
  30. 30.5 × 49 =
  31. 31.39 × 98 =
  32. 32.12 × 19 =
  33. 33.9 × 9 =
  34. 34.11 × 29 =
  35. 35.13 × 19 =
  36. 36.30 × 99 =
  37. 37.3 × 49 =
  38. 38.5 × 9 =
  39. 39.4 × 49 =
  40. 40.7 × 9 =

Answer key

  1. 490
  2. 1078
  3. 174
  4. 133
  5. 145
  6. 2940
  7. 45
  8. 377
  9. 54
  10. 539
  11. 637
  12. 377
  13. 2940
  14. 1470
  15. 108
  16. 36
  17. 406
  18. 116
  19. 377
  20. 196
  21. 203
  22. 319
  23. 99
  24. 108
  25. 377
  26. 95
  27. 174
  28. 63
  29. 95
  30. 245
  31. 3822
  32. 228
  33. 81
  34. 319
  35. 247
  36. 2970
  37. 147
  38. 45
  39. 196
  40. 63

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