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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 544 · 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. 1.64 + 86 =
  2. 2.63 + 33 =
  3. 3.64 + 44 =
  4. 4.25 + 59 =
  5. 5.84 + 36 =
  6. 6.37 + 75 =
  7. 7.47 + 54 =
  8. 8.25 + 31 =
  9. 9.52 + 79 =
  10. 10.25 + 84 =
  11. 11.23 + 56 =
  12. 12.35 + 58 =
  13. 13.27 + 67 =
  14. 14.40 + 52 =
  15. 15.44 + 84 =
  16. 16.59 + 45 =
  17. 17.22 + 35 =
  18. 18.30 + 41 =
  19. 19.74 + 65 =
  20. 20.38 + 41 =
  21. 21.59 + 29 =
  22. 22.35 + 57 =
  23. 23.38 + 75 =
  24. 24.59 + 74 =
  25. 25.44 + 15 =
  26. 26.31 + 24 =
  27. 27.75 + 28 =
  28. 28.75 + 41 =
  29. 29.78 + 56 =
  30. 30.44 + 68 =
  31. 31.43 + 86 =
  32. 32.46 + 29 =
  33. 33.36 + 78 =
  34. 34.87 + 77 =
  35. 35.49 + 58 =
  36. 36.38 + 53 =
  37. 37.60 + 75 =
  38. 38.27 + 36 =
  39. 39.28 + 81 =
  40. 40.42 + 41 =

Answer key

  1. 150
  2. 96
  3. 108
  4. 84
  5. 120
  6. 112
  7. 101
  8. 56
  9. 131
  10. 109
  11. 79
  12. 93
  13. 94
  14. 92
  15. 128
  16. 104
  17. 57
  18. 71
  19. 139
  20. 79
  21. 88
  22. 92
  23. 113
  24. 133
  25. 59
  26. 55
  27. 103
  28. 116
  29. 134
  30. 112
  31. 129
  32. 75
  33. 114
  34. 164
  35. 107
  36. 91
  37. 135
  38. 63
  39. 109
  40. 83

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