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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 223 · 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. 1.74 + 48 =
  2. 2.33 + 55 =
  3. 3.58 + 12 =
  4. 4.70 + 51 =
  5. 5.78 + 52 =
  6. 6.26 + 65 =
  7. 7.47 + 71 =
  8. 8.44 + 63 =
  9. 9.61 + 53 =
  10. 10.80 + 31 =
  11. 11.62 + 23 =
  12. 12.77 + 26 =
  13. 13.60 + 64 =
  14. 14.52 + 13 =
  15. 15.47 + 39 =
  16. 16.51 + 86 =
  17. 17.46 + 89 =
  18. 18.43 + 31 =
  19. 19.74 + 59 =
  20. 20.42 + 58 =
  21. 21.35 + 66 =
  22. 22.51 + 19 =
  23. 23.68 + 86 =
  24. 24.41 + 57 =
  25. 25.45 + 31 =
  26. 26.55 + 22 =
  27. 27.30 + 71 =
  28. 28.39 + 62 =
  29. 29.59 + 63 =
  30. 30.59 + 41 =
  31. 31.53 + 71 =
  32. 32.59 + 16 =
  33. 33.26 + 22 =
  34. 34.24 + 58 =
  35. 35.77 + 83 =
  36. 36.60 + 21 =
  37. 37.51 + 59 =
  38. 38.49 + 53 =
  39. 39.31 + 56 =
  40. 40.26 + 53 =

Answer key

  1. 122
  2. 88
  3. 70
  4. 121
  5. 130
  6. 91
  7. 118
  8. 107
  9. 114
  10. 111
  11. 85
  12. 103
  13. 124
  14. 65
  15. 86
  16. 137
  17. 135
  18. 74
  19. 133
  20. 100
  21. 101
  22. 70
  23. 154
  24. 98
  25. 76
  26. 77
  27. 101
  28. 101
  29. 122
  30. 100
  31. 124
  32. 75
  33. 48
  34. 82
  35. 160
  36. 81
  37. 110
  38. 102
  39. 87
  40. 79

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