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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 650 · 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. 1.29 + 85 =
  2. 2.23 + 63 =
  3. 3.64 + 86 =
  4. 4.53 + 75 =
  5. 5.52 + 85 =
  6. 6.85 + 52 =
  7. 7.79 + 22 =
  8. 8.71 + 61 =
  9. 9.27 + 78 =
  10. 10.42 + 42 =
  11. 11.33 + 28 =
  12. 12.87 + 41 =
  13. 13.35 + 63 =
  14. 14.78 + 64 =
  15. 15.80 + 81 =
  16. 16.89 + 76 =
  17. 17.79 + 74 =
  18. 18.60 + 29 =
  19. 19.38 + 74 =
  20. 20.81 + 89 =
  21. 21.35 + 29 =
  22. 22.82 + 51 =
  23. 23.75 + 18 =
  24. 24.49 + 13 =
  25. 25.44 + 42 =
  26. 26.41 + 44 =
  27. 27.70 + 26 =
  28. 28.66 + 24 =
  29. 29.89 + 35 =
  30. 30.71 + 42 =
  31. 31.62 + 63 =
  32. 32.76 + 44 =
  33. 33.56 + 12 =
  34. 34.84 + 63 =
  35. 35.23 + 38 =
  36. 36.24 + 19 =
  37. 37.45 + 61 =
  38. 38.21 + 28 =
  39. 39.65 + 19 =
  40. 40.60 + 13 =

Answer key

  1. 114
  2. 86
  3. 150
  4. 128
  5. 137
  6. 137
  7. 101
  8. 132
  9. 105
  10. 84
  11. 61
  12. 128
  13. 98
  14. 142
  15. 161
  16. 165
  17. 153
  18. 89
  19. 112
  20. 170
  21. 64
  22. 133
  23. 93
  24. 62
  25. 86
  26. 85
  27. 96
  28. 90
  29. 124
  30. 113
  31. 125
  32. 120
  33. 68
  34. 147
  35. 61
  36. 43
  37. 106
  38. 49
  39. 84
  40. 73

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