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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 277 · 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. 1.5 × 29 =
  2. 2.5 × 29 =
  3. 3.10 × 49 =
  4. 4.11 × 99 =
  5. 5.24 × 99 =
  6. 6.6 × 19 =
  7. 7.9 × 19 =
  8. 8.14 × 49 =
  9. 9.11 × 98 =
  10. 10.7 × 19 =
  11. 11.4 × 98 =
  12. 12.6 × 29 =
  13. 13.3 × 29 =
  14. 14.15 × 49 =
  15. 15.8 × 9 =
  16. 16.14 × 19 =
  17. 17.32 × 98 =
  18. 18.15 × 9 =
  19. 19.23 × 98 =
  20. 20.3 × 19 =
  21. 21.34 × 99 =
  22. 22.15 × 19 =
  23. 23.12 × 99 =
  24. 24.13 × 49 =
  25. 25.13 × 99 =
  26. 26.3 × 9 =
  27. 27.11 × 19 =
  28. 28.15 × 9 =
  29. 29.4 × 9 =
  30. 30.36 × 99 =
  31. 31.9 × 9 =
  32. 32.11 × 9 =
  33. 33.5 × 19 =
  34. 34.6 × 49 =
  35. 35.13 × 99 =
  36. 36.14 × 19 =
  37. 37.12 × 19 =
  38. 38.6 × 9 =
  39. 39.10 × 29 =
  40. 40.4 × 19 =

Answer key

  1. 145
  2. 145
  3. 490
  4. 1089
  5. 2376
  6. 114
  7. 171
  8. 686
  9. 1078
  10. 133
  11. 392
  12. 174
  13. 87
  14. 735
  15. 72
  16. 266
  17. 3136
  18. 135
  19. 2254
  20. 57
  21. 3366
  22. 285
  23. 1188
  24. 637
  25. 1287
  26. 27
  27. 209
  28. 135
  29. 36
  30. 3564
  31. 81
  32. 99
  33. 95
  34. 294
  35. 1287
  36. 266
  37. 228
  38. 54
  39. 290
  40. 76

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