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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 257 · 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. 1.9 × 99 =
  2. 2.30 × 98 =
  3. 3.12 × 19 =
  4. 4.3 × 9 =
  5. 5.36 × 98 =
  6. 6.33 × 98 =
  7. 7.5 × 98 =
  8. 8.3 × 98 =
  9. 9.6 × 49 =
  10. 10.9 × 49 =
  11. 11.11 × 9 =
  12. 12.7 × 9 =
  13. 13.7 × 9 =
  14. 14.34 × 98 =
  15. 15.15 × 9 =
  16. 16.10 × 9 =
  17. 17.6 × 19 =
  18. 18.7 × 9 =
  19. 19.3 × 98 =
  20. 20.12 × 29 =
  21. 21.5 × 19 =
  22. 22.3 × 9 =
  23. 23.23 × 99 =
  24. 24.14 × 49 =
  25. 25.6 × 19 =
  26. 26.11 × 9 =
  27. 27.11 × 49 =
  28. 28.10 × 29 =
  29. 29.14 × 19 =
  30. 30.10 × 49 =
  31. 31.11 × 49 =
  32. 32.4 × 99 =
  33. 33.11 × 99 =
  34. 34.15 × 98 =
  35. 35.11 × 19 =
  36. 36.9 × 9 =
  37. 37.5 × 49 =
  38. 38.12 × 9 =
  39. 39.8 × 29 =
  40. 40.3 × 29 =

Answer key

  1. 891
  2. 2940
  3. 228
  4. 27
  5. 3528
  6. 3234
  7. 490
  8. 294
  9. 294
  10. 441
  11. 99
  12. 63
  13. 63
  14. 3332
  15. 135
  16. 90
  17. 114
  18. 63
  19. 294
  20. 348
  21. 95
  22. 27
  23. 2277
  24. 686
  25. 114
  26. 99
  27. 539
  28. 290
  29. 266
  30. 490
  31. 539
  32. 396
  33. 1089
  34. 1470
  35. 209
  36. 81
  37. 245
  38. 108
  39. 232
  40. 87

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