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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 782 · 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. 1.12 × 19 =
  2. 2.3 × 99 =
  3. 3.4 × 19 =
  4. 4.15 × 49 =
  5. 5.13 × 9 =
  6. 6.7 × 29 =
  7. 7.3 × 49 =
  8. 8.7 × 29 =
  9. 9.36 × 98 =
  10. 10.9 × 9 =
  11. 11.4 × 98 =
  12. 12.12 × 9 =
  13. 13.14 × 98 =
  14. 14.8 × 19 =
  15. 15.7 × 9 =
  16. 16.7 × 29 =
  17. 17.8 × 98 =
  18. 18.5 × 29 =
  19. 19.25 × 99 =
  20. 20.15 × 19 =
  21. 21.6 × 9 =
  22. 22.15 × 49 =
  23. 23.25 × 98 =
  24. 24.34 × 98 =
  25. 25.7 × 99 =
  26. 26.6 × 9 =
  27. 27.7 × 9 =
  28. 28.9 × 19 =
  29. 29.6 × 19 =
  30. 30.19 × 99 =
  31. 31.6 × 9 =
  32. 32.9 × 19 =
  33. 33.17 × 98 =
  34. 34.10 × 19 =
  35. 35.6 × 9 =
  36. 36.8 × 49 =
  37. 37.14 × 49 =
  38. 38.4 × 9 =
  39. 39.15 × 9 =
  40. 40.15 × 19 =

Answer key

  1. 228
  2. 297
  3. 76
  4. 735
  5. 117
  6. 203
  7. 147
  8. 203
  9. 3528
  10. 81
  11. 392
  12. 108
  13. 1372
  14. 152
  15. 63
  16. 203
  17. 784
  18. 145
  19. 2475
  20. 285
  21. 54
  22. 735
  23. 2450
  24. 3332
  25. 693
  26. 54
  27. 63
  28. 171
  29. 114
  30. 1881
  31. 54
  32. 171
  33. 1666
  34. 190
  35. 54
  36. 392
  37. 686
  38. 36
  39. 135
  40. 285

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