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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 762 · 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. 1.37 + 13 =
  2. 2.61 + 52 =
  3. 3.57 + 32 =
  4. 4.58 + 14 =
  5. 5.22 + 74 =
  6. 6.55 + 42 =
  7. 7.65 + 64 =
  8. 8.64 + 38 =
  9. 9.69 + 31 =
  10. 10.87 + 19 =
  11. 11.82 + 31 =
  12. 12.64 + 86 =
  13. 13.49 + 31 =
  14. 14.67 + 46 =
  15. 15.44 + 23 =
  16. 16.85 + 42 =
  17. 17.75 + 74 =
  18. 18.86 + 89 =
  19. 19.23 + 58 =
  20. 20.35 + 51 =
  21. 21.82 + 48 =
  22. 22.25 + 88 =
  23. 23.28 + 71 =
  24. 24.88 + 51 =
  25. 25.37 + 54 =
  26. 26.51 + 29 =
  27. 27.71 + 81 =
  28. 28.33 + 33 =
  29. 29.79 + 47 =
  30. 30.53 + 84 =
  31. 31.52 + 62 =
  32. 32.77 + 77 =
  33. 33.30 + 29 =
  34. 34.76 + 36 =
  35. 35.89 + 34 =
  36. 36.52 + 29 =
  37. 37.46 + 43 =
  38. 38.43 + 14 =
  39. 39.89 + 78 =
  40. 40.77 + 39 =

Answer key

  1. 50
  2. 113
  3. 89
  4. 72
  5. 96
  6. 97
  7. 129
  8. 102
  9. 100
  10. 106
  11. 113
  12. 150
  13. 80
  14. 113
  15. 67
  16. 127
  17. 149
  18. 175
  19. 81
  20. 86
  21. 130
  22. 113
  23. 99
  24. 139
  25. 91
  26. 80
  27. 152
  28. 66
  29. 126
  30. 137
  31. 114
  32. 154
  33. 59
  34. 112
  35. 123
  36. 81
  37. 89
  38. 57
  39. 167
  40. 116

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