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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 479 · 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. 1.6 × 49 =
  2. 2.11 × 29 =
  3. 3.9 × 49 =
  4. 4.11 × 98 =
  5. 5.4 × 49 =
  6. 6.30 × 98 =
  7. 7.6 × 9 =
  8. 8.36 × 98 =
  9. 9.12 × 99 =
  10. 10.7 × 19 =
  11. 11.8 × 19 =
  12. 12.7 × 49 =
  13. 13.13 × 49 =
  14. 14.33 × 98 =
  15. 15.7 × 49 =
  16. 16.9 × 19 =
  17. 17.12 × 19 =
  18. 18.25 × 98 =
  19. 19.17 × 99 =
  20. 20.14 × 29 =
  21. 21.4 × 9 =
  22. 22.15 × 9 =
  23. 23.22 × 98 =
  24. 24.37 × 98 =
  25. 25.15 × 19 =
  26. 26.15 × 99 =
  27. 27.4 × 29 =
  28. 28.8 × 19 =
  29. 29.12 × 49 =
  30. 30.13 × 19 =
  31. 31.7 × 9 =
  32. 32.4 × 29 =
  33. 33.7 × 99 =
  34. 34.6 × 19 =
  35. 35.12 × 19 =
  36. 36.12 × 19 =
  37. 37.11 × 49 =
  38. 38.11 × 19 =
  39. 39.3 × 49 =
  40. 40.25 × 98 =

Answer key

  1. 294
  2. 319
  3. 441
  4. 1078
  5. 196
  6. 2940
  7. 54
  8. 3528
  9. 1188
  10. 133
  11. 152
  12. 343
  13. 637
  14. 3234
  15. 343
  16. 171
  17. 228
  18. 2450
  19. 1683
  20. 406
  21. 36
  22. 135
  23. 2156
  24. 3626
  25. 285
  26. 1485
  27. 116
  28. 152
  29. 588
  30. 247
  31. 63
  32. 116
  33. 693
  34. 114
  35. 228
  36. 228
  37. 539
  38. 209
  39. 147
  40. 2450

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