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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 787 · 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. 1.26 + 19 =
  2. 2.78 + 54 =
  3. 3.68 + 31 =
  4. 4.21 + 12 =
  5. 5.66 + 41 =
  6. 6.71 + 32 =
  7. 7.22 + 34 =
  8. 8.69 + 13 =
  9. 9.29 + 42 =
  10. 10.88 + 72 =
  11. 11.65 + 68 =
  12. 12.62 + 71 =
  13. 13.63 + 88 =
  14. 14.51 + 58 =
  15. 15.51 + 59 =
  16. 16.84 + 87 =
  17. 17.38 + 89 =
  18. 18.83 + 61 =
  19. 19.58 + 22 =
  20. 20.46 + 18 =
  21. 21.83 + 87 =
  22. 22.32 + 16 =
  23. 23.60 + 33 =
  24. 24.79 + 85 =
  25. 25.89 + 45 =
  26. 26.39 + 64 =
  27. 27.69 + 47 =
  28. 28.72 + 84 =
  29. 29.24 + 51 =
  30. 30.49 + 69 =
  31. 31.26 + 84 =
  32. 32.81 + 69 =
  33. 33.49 + 41 =
  34. 34.58 + 75 =
  35. 35.75 + 81 =
  36. 36.44 + 21 =
  37. 37.69 + 36 =
  38. 38.80 + 57 =
  39. 39.88 + 87 =
  40. 40.28 + 89 =

Answer key

  1. 45
  2. 132
  3. 99
  4. 33
  5. 107
  6. 103
  7. 56
  8. 82
  9. 71
  10. 160
  11. 133
  12. 133
  13. 151
  14. 109
  15. 110
  16. 171
  17. 127
  18. 144
  19. 80
  20. 64
  21. 170
  22. 48
  23. 93
  24. 164
  25. 134
  26. 103
  27. 116
  28. 156
  29. 75
  30. 118
  31. 110
  32. 150
  33. 90
  34. 133
  35. 156
  36. 65
  37. 105
  38. 137
  39. 175
  40. 117

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