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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 830 · 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. 1.80 + 76 =
  2. 2.66 + 31 =
  3. 3.58 + 21 =
  4. 4.65 + 85 =
  5. 5.30 + 41 =
  6. 6.71 + 45 =
  7. 7.68 + 33 =
  8. 8.53 + 63 =
  9. 9.74 + 21 =
  10. 10.64 + 32 =
  11. 11.51 + 61 =
  12. 12.88 + 42 =
  13. 13.32 + 61 =
  14. 14.34 + 86 =
  15. 15.84 + 25 =
  16. 16.48 + 69 =
  17. 17.41 + 15 =
  18. 18.66 + 71 =
  19. 19.46 + 48 =
  20. 20.25 + 51 =
  21. 21.32 + 49 =
  22. 22.22 + 57 =
  23. 23.44 + 74 =
  24. 24.72 + 16 =
  25. 25.64 + 81 =
  26. 26.23 + 49 =
  27. 27.66 + 23 =
  28. 28.39 + 44 =
  29. 29.38 + 53 =
  30. 30.86 + 75 =
  31. 31.83 + 26 =
  32. 32.27 + 82 =
  33. 33.60 + 38 =
  34. 34.40 + 51 =
  35. 35.66 + 72 =
  36. 36.35 + 77 =
  37. 37.37 + 26 =
  38. 38.52 + 69 =
  39. 39.70 + 33 =
  40. 40.25 + 71 =

Answer key

  1. 156
  2. 97
  3. 79
  4. 150
  5. 71
  6. 116
  7. 101
  8. 116
  9. 95
  10. 96
  11. 112
  12. 130
  13. 93
  14. 120
  15. 109
  16. 117
  17. 56
  18. 137
  19. 94
  20. 76
  21. 81
  22. 79
  23. 118
  24. 88
  25. 145
  26. 72
  27. 89
  28. 83
  29. 91
  30. 161
  31. 109
  32. 109
  33. 98
  34. 91
  35. 138
  36. 112
  37. 63
  38. 121
  39. 103
  40. 96

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