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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 674 · 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. 1.7 × 19 =
  2. 2.12 × 19 =
  3. 3.7 × 19 =
  4. 4.20 × 99 =
  5. 5.10 × 49 =
  6. 6.14 × 9 =
  7. 7.39 × 98 =
  8. 8.4 × 49 =
  9. 9.30 × 99 =
  10. 10.9 × 98 =
  11. 11.12 × 19 =
  12. 12.11 × 49 =
  13. 13.17 × 98 =
  14. 14.10 × 9 =
  15. 15.10 × 99 =
  16. 16.20 × 99 =
  17. 17.14 × 49 =
  18. 18.4 × 29 =
  19. 19.15 × 19 =
  20. 20.9 × 99 =
  21. 21.4 × 9 =
  22. 22.11 × 9 =
  23. 23.3 × 49 =
  24. 24.15 × 49 =
  25. 25.12 × 19 =
  26. 26.10 × 98 =
  27. 27.6 × 49 =
  28. 28.12 × 99 =
  29. 29.13 × 29 =
  30. 30.4 × 29 =
  31. 31.27 × 98 =
  32. 32.13 × 49 =
  33. 33.10 × 49 =
  34. 34.15 × 49 =
  35. 35.15 × 49 =
  36. 36.14 × 29 =
  37. 37.5 × 29 =
  38. 38.13 × 29 =
  39. 39.4 × 29 =
  40. 40.15 × 49 =

Answer key

  1. 133
  2. 228
  3. 133
  4. 1980
  5. 490
  6. 126
  7. 3822
  8. 196
  9. 2970
  10. 882
  11. 228
  12. 539
  13. 1666
  14. 90
  15. 990
  16. 1980
  17. 686
  18. 116
  19. 285
  20. 891
  21. 36
  22. 99
  23. 147
  24. 735
  25. 228
  26. 980
  27. 294
  28. 1188
  29. 377
  30. 116
  31. 2646
  32. 637
  33. 490
  34. 735
  35. 735
  36. 406
  37. 145
  38. 377
  39. 116
  40. 735

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