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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 95 · 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. 1.43 + 34 =
  2. 2.46 + 21 =
  3. 3.83 + 66 =
  4. 4.58 + 74 =
  5. 5.39 + 61 =
  6. 6.77 + 66 =
  7. 7.34 + 75 =
  8. 8.40 + 32 =
  9. 9.70 + 85 =
  10. 10.75 + 48 =
  11. 11.47 + 61 =
  12. 12.76 + 88 =
  13. 13.74 + 27 =
  14. 14.56 + 38 =
  15. 15.51 + 76 =
  16. 16.59 + 84 =
  17. 17.75 + 31 =
  18. 18.82 + 64 =
  19. 19.63 + 77 =
  20. 20.40 + 81 =
  21. 21.47 + 63 =
  22. 22.45 + 38 =
  23. 23.44 + 14 =
  24. 24.34 + 79 =
  25. 25.61 + 81 =
  26. 26.32 + 51 =
  27. 27.36 + 79 =
  28. 28.59 + 81 =
  29. 29.28 + 71 =
  30. 30.52 + 12 =
  31. 31.21 + 24 =
  32. 32.79 + 27 =
  33. 33.35 + 43 =
  34. 34.34 + 21 =
  35. 35.38 + 33 =
  36. 36.56 + 73 =
  37. 37.26 + 25 =
  38. 38.84 + 51 =
  39. 39.62 + 13 =
  40. 40.82 + 85 =

Answer key

  1. 77
  2. 67
  3. 149
  4. 132
  5. 100
  6. 143
  7. 109
  8. 72
  9. 155
  10. 123
  11. 108
  12. 164
  13. 101
  14. 94
  15. 127
  16. 143
  17. 106
  18. 146
  19. 140
  20. 121
  21. 110
  22. 83
  23. 58
  24. 113
  25. 142
  26. 83
  27. 115
  28. 140
  29. 99
  30. 64
  31. 45
  32. 106
  33. 78
  34. 55
  35. 71
  36. 129
  37. 51
  38. 135
  39. 75
  40. 167

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