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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 115 · 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. 1.70 + 17 =
  2. 2.22 + 68 =
  3. 3.23 + 37 =
  4. 4.79 + 13 =
  5. 5.56 + 17 =
  6. 6.23 + 71 =
  7. 7.55 + 38 =
  8. 8.69 + 39 =
  9. 9.26 + 64 =
  10. 10.28 + 57 =
  11. 11.74 + 49 =
  12. 12.65 + 43 =
  13. 13.58 + 49 =
  14. 14.36 + 14 =
  15. 15.32 + 23 =
  16. 16.50 + 88 =
  17. 17.74 + 36 =
  18. 18.30 + 19 =
  19. 19.62 + 72 =
  20. 20.35 + 88 =
  21. 21.58 + 85 =
  22. 22.26 + 76 =
  23. 23.56 + 71 =
  24. 24.63 + 58 =
  25. 25.74 + 21 =
  26. 26.22 + 48 =
  27. 27.56 + 72 =
  28. 28.85 + 79 =
  29. 29.60 + 79 =
  30. 30.58 + 83 =
  31. 31.78 + 28 =
  32. 32.73 + 21 =
  33. 33.63 + 67 =
  34. 34.69 + 21 =
  35. 35.73 + 14 =
  36. 36.26 + 86 =
  37. 37.71 + 37 =
  38. 38.65 + 24 =
  39. 39.45 + 79 =
  40. 40.61 + 49 =

Answer key

  1. 87
  2. 90
  3. 60
  4. 92
  5. 73
  6. 94
  7. 93
  8. 108
  9. 90
  10. 85
  11. 123
  12. 108
  13. 107
  14. 50
  15. 55
  16. 138
  17. 110
  18. 49
  19. 134
  20. 123
  21. 143
  22. 102
  23. 127
  24. 121
  25. 95
  26. 70
  27. 128
  28. 164
  29. 139
  30. 141
  31. 106
  32. 94
  33. 130
  34. 90
  35. 87
  36. 112
  37. 108
  38. 89
  39. 124
  40. 110

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