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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 878 · 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. 1.13 × 29 =
  2. 2.8 × 19 =
  3. 3.7 × 19 =
  4. 4.7 × 29 =
  5. 5.25 × 99 =
  6. 6.12 × 29 =
  7. 7.12 × 19 =
  8. 8.4 × 9 =
  9. 9.14 × 49 =
  10. 10.13 × 98 =
  11. 11.6 × 19 =
  12. 12.12 × 19 =
  13. 13.12 × 19 =
  14. 14.14 × 9 =
  15. 15.9 × 98 =
  16. 16.15 × 19 =
  17. 17.31 × 98 =
  18. 18.7 × 98 =
  19. 19.33 × 98 =
  20. 20.6 × 99 =
  21. 21.40 × 99 =
  22. 22.35 × 98 =
  23. 23.10 × 99 =
  24. 24.9 × 29 =
  25. 25.3 × 9 =
  26. 26.6 × 9 =
  27. 27.3 × 49 =
  28. 28.7 × 99 =
  29. 29.4 × 9 =
  30. 30.9 × 19 =
  31. 31.10 × 29 =
  32. 32.12 × 29 =
  33. 33.3 × 19 =
  34. 34.8 × 19 =
  35. 35.10 × 29 =
  36. 36.6 × 29 =
  37. 37.3 × 19 =
  38. 38.7 × 9 =
  39. 39.4 × 99 =
  40. 40.27 × 99 =

Answer key

  1. 377
  2. 152
  3. 133
  4. 203
  5. 2475
  6. 348
  7. 228
  8. 36
  9. 686
  10. 1274
  11. 114
  12. 228
  13. 228
  14. 126
  15. 882
  16. 285
  17. 3038
  18. 686
  19. 3234
  20. 594
  21. 3960
  22. 3430
  23. 990
  24. 261
  25. 27
  26. 54
  27. 147
  28. 693
  29. 36
  30. 171
  31. 290
  32. 348
  33. 57
  34. 152
  35. 290
  36. 174
  37. 57
  38. 63
  39. 396
  40. 2673

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