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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 786 · 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 + 31 =
  2. 2.83 + 66 =
  3. 3.69 + 56 =
  4. 4.37 + 72 =
  5. 5.65 + 81 =
  6. 6.58 + 53 =
  7. 7.58 + 61 =
  8. 8.29 + 85 =
  9. 9.81 + 54 =
  10. 10.59 + 76 =
  11. 11.86 + 28 =
  12. 12.31 + 61 =
  13. 13.31 + 32 =
  14. 14.27 + 55 =
  15. 15.44 + 81 =
  16. 16.63 + 56 =
  17. 17.23 + 57 =
  18. 18.32 + 13 =
  19. 19.26 + 56 =
  20. 20.37 + 32 =
  21. 21.69 + 76 =
  22. 22.27 + 31 =
  23. 23.31 + 48 =
  24. 24.22 + 44 =
  25. 25.79 + 23 =
  26. 26.89 + 59 =
  27. 27.27 + 85 =
  28. 28.68 + 32 =
  29. 29.42 + 34 =
  30. 30.28 + 79 =
  31. 31.33 + 79 =
  32. 32.57 + 19 =
  33. 33.50 + 81 =
  34. 34.66 + 41 =
  35. 35.75 + 27 =
  36. 36.51 + 77 =
  37. 37.47 + 34 =
  38. 38.21 + 63 =
  39. 39.64 + 14 =
  40. 40.69 + 32 =

Answer key

  1. 68
  2. 149
  3. 125
  4. 109
  5. 146
  6. 111
  7. 119
  8. 114
  9. 135
  10. 135
  11. 114
  12. 92
  13. 63
  14. 82
  15. 125
  16. 119
  17. 80
  18. 45
  19. 82
  20. 69
  21. 145
  22. 58
  23. 79
  24. 66
  25. 102
  26. 148
  27. 112
  28. 100
  29. 76
  30. 107
  31. 112
  32. 76
  33. 131
  34. 107
  35. 102
  36. 128
  37. 81
  38. 84
  39. 78
  40. 101

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