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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 767 · 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 + 21 =
  2. 2.22 + 64 =
  3. 3.52 + 31 =
  4. 4.73 + 13 =
  5. 5.84 + 59 =
  6. 6.21 + 23 =
  7. 7.44 + 43 =
  8. 8.71 + 34 =
  9. 9.42 + 12 =
  10. 10.33 + 31 =
  11. 11.69 + 56 =
  12. 12.36 + 41 =
  13. 13.29 + 44 =
  14. 14.52 + 68 =
  15. 15.83 + 77 =
  16. 16.71 + 14 =
  17. 17.50 + 35 =
  18. 18.37 + 31 =
  19. 19.70 + 29 =
  20. 20.28 + 52 =
  21. 21.69 + 64 =
  22. 22.87 + 69 =
  23. 23.87 + 86 =
  24. 24.61 + 56 =
  25. 25.70 + 18 =
  26. 26.42 + 44 =
  27. 27.22 + 34 =
  28. 28.50 + 77 =
  29. 29.62 + 74 =
  30. 30.29 + 53 =
  31. 31.33 + 13 =
  32. 32.59 + 55 =
  33. 33.71 + 36 =
  34. 34.77 + 87 =
  35. 35.44 + 51 =
  36. 36.54 + 24 =
  37. 37.28 + 38 =
  38. 38.28 + 66 =
  39. 39.81 + 15 =
  40. 40.44 + 26 =

Answer key

  1. 85
  2. 86
  3. 83
  4. 86
  5. 143
  6. 44
  7. 87
  8. 105
  9. 54
  10. 64
  11. 125
  12. 77
  13. 73
  14. 120
  15. 160
  16. 85
  17. 85
  18. 68
  19. 99
  20. 80
  21. 133
  22. 156
  23. 173
  24. 117
  25. 88
  26. 86
  27. 56
  28. 127
  29. 136
  30. 82
  31. 46
  32. 114
  33. 107
  34. 164
  35. 95
  36. 78
  37. 66
  38. 94
  39. 96
  40. 70

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