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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 266 · 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 + 85 =
  2. 2.23 + 86 =
  3. 3.59 + 58 =
  4. 4.72 + 26 =
  5. 5.76 + 13 =
  6. 6.26 + 26 =
  7. 7.77 + 19 =
  8. 8.75 + 27 =
  9. 9.84 + 72 =
  10. 10.88 + 59 =
  11. 11.78 + 31 =
  12. 12.72 + 36 =
  13. 13.51 + 49 =
  14. 14.64 + 48 =
  15. 15.62 + 61 =
  16. 16.52 + 25 =
  17. 17.36 + 24 =
  18. 18.70 + 21 =
  19. 19.76 + 75 =
  20. 20.24 + 28 =
  21. 21.71 + 16 =
  22. 22.24 + 79 =
  23. 23.63 + 71 =
  24. 24.80 + 46 =
  25. 25.25 + 53 =
  26. 26.75 + 21 =
  27. 27.48 + 43 =
  28. 28.65 + 31 =
  29. 29.74 + 77 =
  30. 30.68 + 47 =
  31. 31.87 + 41 =
  32. 32.84 + 36 =
  33. 33.84 + 61 =
  34. 34.79 + 56 =
  35. 35.85 + 76 =
  36. 36.56 + 33 =
  37. 37.68 + 48 =
  38. 38.74 + 64 =
  39. 39.59 + 19 =
  40. 40.55 + 69 =

Answer key

  1. 111
  2. 109
  3. 117
  4. 98
  5. 89
  6. 52
  7. 96
  8. 102
  9. 156
  10. 147
  11. 109
  12. 108
  13. 100
  14. 112
  15. 123
  16. 77
  17. 60
  18. 91
  19. 151
  20. 52
  21. 87
  22. 103
  23. 134
  24. 126
  25. 78
  26. 96
  27. 91
  28. 96
  29. 151
  30. 115
  31. 128
  32. 120
  33. 145
  34. 135
  35. 161
  36. 89
  37. 116
  38. 138
  39. 78
  40. 124

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