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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 220 · 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 × 99 =
  2. 2.9 × 98 =
  3. 3.31 × 99 =
  4. 4.11 × 9 =
  5. 5.21 × 98 =
  6. 6.3 × 99 =
  7. 7.12 × 19 =
  8. 8.4 × 49 =
  9. 9.5 × 29 =
  10. 10.6 × 9 =
  11. 11.12 × 29 =
  12. 12.3 × 9 =
  13. 13.7 × 9 =
  14. 14.14 × 49 =
  15. 15.11 × 29 =
  16. 16.29 × 98 =
  17. 17.6 × 19 =
  18. 18.22 × 98 =
  19. 19.10 × 99 =
  20. 20.13 × 19 =
  21. 21.16 × 98 =
  22. 22.5 × 49 =
  23. 23.6 × 29 =
  24. 24.19 × 99 =
  25. 25.4 × 9 =
  26. 26.13 × 98 =
  27. 27.23 × 99 =
  28. 28.14 × 19 =
  29. 29.6 × 9 =
  30. 30.21 × 99 =
  31. 31.7 × 19 =
  32. 32.4 × 49 =
  33. 33.4 × 19 =
  34. 34.3 × 99 =
  35. 35.13 × 19 =
  36. 36.9 × 29 =
  37. 37.9 × 98 =
  38. 38.10 × 49 =
  39. 39.11 × 19 =
  40. 40.32 × 98 =

Answer key

  1. 495
  2. 882
  3. 3069
  4. 99
  5. 2058
  6. 297
  7. 228
  8. 196
  9. 145
  10. 54
  11. 348
  12. 27
  13. 63
  14. 686
  15. 319
  16. 2842
  17. 114
  18. 2156
  19. 990
  20. 247
  21. 1568
  22. 245
  23. 174
  24. 1881
  25. 36
  26. 1274
  27. 2277
  28. 266
  29. 54
  30. 2079
  31. 133
  32. 196
  33. 76
  34. 297
  35. 247
  36. 261
  37. 882
  38. 490
  39. 209
  40. 3136

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