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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 716 · 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. 2.4 × 98 =
  3. 3.9 × 98 =
  4. 4.38 × 98 =
  5. 5.9 × 9 =
  6. 6.12 × 19 =
  7. 7.4 × 49 =
  8. 8.15 × 9 =
  9. 9.14 × 49 =
  10. 10.8 × 19 =
  11. 11.12 × 29 =
  12. 12.11 × 99 =
  13. 13.19 × 99 =
  14. 14.12 × 19 =
  15. 15.5 × 29 =
  16. 16.13 × 9 =
  17. 17.3 × 9 =
  18. 18.14 × 9 =
  19. 19.12 × 19 =
  20. 20.7 × 29 =
  21. 21.14 × 9 =
  22. 22.14 × 49 =
  23. 23.8 × 19 =
  24. 24.30 × 98 =
  25. 25.7 × 9 =
  26. 26.6 × 9 =
  27. 27.8 × 19 =
  28. 28.10 × 19 =
  29. 29.8 × 49 =
  30. 30.3 × 19 =
  31. 31.14 × 49 =
  32. 32.37 × 98 =
  33. 33.11 × 9 =
  34. 34.15 × 29 =
  35. 35.35 × 99 =
  36. 36.8 × 9 =
  37. 37.33 × 98 =
  38. 38.21 × 99 =
  39. 39.7 × 29 =
  40. 40.13 × 49 =

Answer key

  1. 228
  2. 392
  3. 882
  4. 3724
  5. 81
  6. 228
  7. 196
  8. 135
  9. 686
  10. 152
  11. 348
  12. 1089
  13. 1881
  14. 228
  15. 145
  16. 117
  17. 27
  18. 126
  19. 228
  20. 203
  21. 126
  22. 686
  23. 152
  24. 2940
  25. 63
  26. 54
  27. 152
  28. 190
  29. 392
  30. 57
  31. 686
  32. 3626
  33. 99
  34. 435
  35. 3465
  36. 72
  37. 3234
  38. 2079
  39. 203
  40. 637

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