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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 215 · 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. 1.59 + 65 =
  2. 2.85 + 27 =
  3. 3.41 + 61 =
  4. 4.50 + 17 =
  5. 5.59 + 41 =
  6. 6.27 + 34 =
  7. 7.76 + 12 =
  8. 8.34 + 76 =
  9. 9.66 + 33 =
  10. 10.57 + 63 =
  11. 11.67 + 26 =
  12. 12.23 + 17 =
  13. 13.24 + 79 =
  14. 14.43 + 16 =
  15. 15.65 + 73 =
  16. 16.25 + 52 =
  17. 17.41 + 76 =
  18. 18.46 + 64 =
  19. 19.26 + 54 =
  20. 20.56 + 68 =
  21. 21.46 + 71 =
  22. 22.43 + 61 =
  23. 23.78 + 19 =
  24. 24.45 + 56 =
  25. 25.29 + 72 =
  26. 26.47 + 33 =
  27. 27.26 + 37 =
  28. 28.50 + 51 =
  29. 29.30 + 84 =
  30. 30.31 + 56 =
  31. 31.43 + 81 =
  32. 32.44 + 73 =
  33. 33.49 + 13 =
  34. 34.81 + 21 =
  35. 35.27 + 86 =
  36. 36.89 + 16 =
  37. 37.48 + 67 =
  38. 38.39 + 26 =
  39. 39.84 + 56 =
  40. 40.78 + 29 =

Answer key

  1. 124
  2. 112
  3. 102
  4. 67
  5. 100
  6. 61
  7. 88
  8. 110
  9. 99
  10. 120
  11. 93
  12. 40
  13. 103
  14. 59
  15. 138
  16. 77
  17. 117
  18. 110
  19. 80
  20. 124
  21. 117
  22. 104
  23. 97
  24. 101
  25. 101
  26. 80
  27. 63
  28. 101
  29. 114
  30. 87
  31. 124
  32. 117
  33. 62
  34. 102
  35. 113
  36. 105
  37. 115
  38. 65
  39. 140
  40. 107

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