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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 393 · 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. 1.45 + 41 =
  2. 2.31 + 72 =
  3. 3.76 + 83 =
  4. 4.24 + 58 =
  5. 5.83 + 12 =
  6. 6.35 + 47 =
  7. 7.89 + 21 =
  8. 8.50 + 51 =
  9. 9.41 + 27 =
  10. 10.64 + 23 =
  11. 11.59 + 61 =
  12. 12.81 + 47 =
  13. 13.53 + 85 =
  14. 14.86 + 55 =
  15. 15.63 + 88 =
  16. 16.27 + 42 =
  17. 17.37 + 75 =
  18. 18.80 + 16 =
  19. 19.26 + 79 =
  20. 20.44 + 31 =
  21. 21.24 + 32 =
  22. 22.30 + 87 =
  23. 23.74 + 55 =
  24. 24.22 + 77 =
  25. 25.48 + 57 =
  26. 26.87 + 67 =
  27. 27.31 + 78 =
  28. 28.88 + 44 =
  29. 29.86 + 89 =
  30. 30.40 + 87 =
  31. 31.35 + 15 =
  32. 32.50 + 75 =
  33. 33.75 + 29 =
  34. 34.43 + 86 =
  35. 35.34 + 61 =
  36. 36.23 + 53 =
  37. 37.84 + 89 =
  38. 38.21 + 58 =
  39. 39.83 + 33 =
  40. 40.49 + 47 =

Answer key

  1. 86
  2. 103
  3. 159
  4. 82
  5. 95
  6. 82
  7. 110
  8. 101
  9. 68
  10. 87
  11. 120
  12. 128
  13. 138
  14. 141
  15. 151
  16. 69
  17. 112
  18. 96
  19. 105
  20. 75
  21. 56
  22. 117
  23. 129
  24. 99
  25. 105
  26. 154
  27. 109
  28. 132
  29. 175
  30. 127
  31. 50
  32. 125
  33. 104
  34. 129
  35. 95
  36. 76
  37. 173
  38. 79
  39. 116
  40. 96

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