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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 825 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.89 + 12 =
  2. 2.56 + 52 =
  3. 3.41 + 19 =
  4. 4.30 + 47 =
  5. 5.28 + 51 =
  6. 6.64 + 66 =
  7. 7.27 + 65 =
  8. 8.85 + 85 =
  9. 9.48 + 23 =
  10. 10.88 + 21 =
  11. 11.89 + 58 =
  12. 12.61 + 17 =
  13. 13.67 + 53 =
  14. 14.56 + 85 =
  15. 15.34 + 63 =
  16. 16.34 + 18 =
  17. 17.40 + 85 =
  18. 18.46 + 81 =
  19. 19.43 + 75 =
  20. 20.31 + 27 =
  21. 21.23 + 41 =
  22. 22.56 + 35 =
  23. 23.51 + 31 =
  24. 24.29 + 23 =
  25. 25.33 + 19 =
  26. 26.33 + 23 =
  27. 27.75 + 18 =
  28. 28.22 + 74 =
  29. 29.77 + 51 =
  30. 30.57 + 21 =
  31. 31.56 + 64 =
  32. 32.52 + 49 =
  33. 33.67 + 51 =
  34. 34.37 + 15 =
  35. 35.66 + 19 =
  36. 36.75 + 47 =
  37. 37.67 + 71 =
  38. 38.25 + 82 =
  39. 39.65 + 73 =
  40. 40.63 + 47 =

Answer key

  1. 101
  2. 108
  3. 60
  4. 77
  5. 79
  6. 130
  7. 92
  8. 170
  9. 71
  10. 109
  11. 147
  12. 78
  13. 120
  14. 141
  15. 97
  16. 52
  17. 125
  18. 127
  19. 118
  20. 58
  21. 64
  22. 91
  23. 82
  24. 52
  25. 52
  26. 56
  27. 93
  28. 96
  29. 128
  30. 78
  31. 120
  32. 101
  33. 118
  34. 52
  35. 85
  36. 122
  37. 138
  38. 107
  39. 138
  40. 110

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