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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 108 · 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. 1.55 + 68 =
  2. 2.64 + 16 =
  3. 3.37 + 31 =
  4. 4.28 + 63 =
  5. 5.70 + 46 =
  6. 6.44 + 41 =
  7. 7.83 + 13 =
  8. 8.23 + 42 =
  9. 9.41 + 77 =
  10. 10.66 + 15 =
  11. 11.65 + 19 =
  12. 12.86 + 48 =
  13. 13.64 + 23 =
  14. 14.22 + 35 =
  15. 15.53 + 28 =
  16. 16.31 + 75 =
  17. 17.68 + 34 =
  18. 18.23 + 71 =
  19. 19.36 + 61 =
  20. 20.40 + 12 =
  21. 21.53 + 67 =
  22. 22.28 + 49 =
  23. 23.77 + 75 =
  24. 24.26 + 19 =
  25. 25.79 + 31 =
  26. 26.29 + 43 =
  27. 27.50 + 44 =
  28. 28.74 + 42 =
  29. 29.27 + 76 =
  30. 30.30 + 47 =
  31. 31.68 + 44 =
  32. 32.63 + 34 =
  33. 33.24 + 47 =
  34. 34.81 + 46 =
  35. 35.72 + 61 =
  36. 36.83 + 47 =
  37. 37.69 + 74 =
  38. 38.86 + 41 =
  39. 39.28 + 76 =
  40. 40.40 + 43 =

Answer key

  1. 123
  2. 80
  3. 68
  4. 91
  5. 116
  6. 85
  7. 96
  8. 65
  9. 118
  10. 81
  11. 84
  12. 134
  13. 87
  14. 57
  15. 81
  16. 106
  17. 102
  18. 94
  19. 97
  20. 52
  21. 120
  22. 77
  23. 152
  24. 45
  25. 110
  26. 72
  27. 94
  28. 116
  29. 103
  30. 77
  31. 112
  32. 97
  33. 71
  34. 127
  35. 133
  36. 130
  37. 143
  38. 127
  39. 104
  40. 83

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