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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 659 · 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. 1.8 × 98 =
  2. 2.5 × 9 =
  3. 3.7 × 19 =
  4. 4.6 × 9 =
  5. 5.35 × 99 =
  6. 6.10 × 99 =
  7. 7.23 × 99 =
  8. 8.13 × 98 =
  9. 9.13 × 49 =
  10. 10.3 × 19 =
  11. 11.20 × 98 =
  12. 12.6 × 29 =
  13. 13.5 × 29 =
  14. 14.14 × 29 =
  15. 15.12 × 49 =
  16. 16.10 × 29 =
  17. 17.9 × 19 =
  18. 18.13 × 49 =
  19. 19.6 × 29 =
  20. 20.25 × 98 =
  21. 21.10 × 49 =
  22. 22.3 × 99 =
  23. 23.7 × 19 =
  24. 24.7 × 19 =
  25. 25.10 × 98 =
  26. 26.15 × 99 =
  27. 27.26 × 98 =
  28. 28.6 × 98 =
  29. 29.9 × 99 =
  30. 30.15 × 29 =
  31. 31.4 × 49 =
  32. 32.8 × 19 =
  33. 33.23 × 99 =
  34. 34.7 × 9 =
  35. 35.15 × 19 =
  36. 36.12 × 19 =
  37. 37.6 × 9 =
  38. 38.8 × 9 =
  39. 39.13 × 49 =
  40. 40.17 × 98 =

Answer key

  1. 784
  2. 45
  3. 133
  4. 54
  5. 3465
  6. 990
  7. 2277
  8. 1274
  9. 637
  10. 57
  11. 1960
  12. 174
  13. 145
  14. 406
  15. 588
  16. 290
  17. 171
  18. 637
  19. 174
  20. 2450
  21. 490
  22. 297
  23. 133
  24. 133
  25. 980
  26. 1485
  27. 2548
  28. 588
  29. 891
  30. 435
  31. 196
  32. 152
  33. 2277
  34. 63
  35. 285
  36. 228
  37. 54
  38. 72
  39. 637
  40. 1666

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