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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 369 · 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. 1.30 + 77 =
  2. 2.31 + 25 =
  3. 3.44 + 64 =
  4. 4.41 + 53 =
  5. 5.24 + 73 =
  6. 6.53 + 15 =
  7. 7.85 + 21 =
  8. 8.80 + 42 =
  9. 9.52 + 78 =
  10. 10.21 + 15 =
  11. 11.82 + 22 =
  12. 12.75 + 17 =
  13. 13.83 + 27 =
  14. 14.42 + 18 =
  15. 15.67 + 48 =
  16. 16.60 + 59 =
  17. 17.70 + 18 =
  18. 18.84 + 28 =
  19. 19.80 + 76 =
  20. 20.30 + 88 =
  21. 21.75 + 66 =
  22. 22.46 + 29 =
  23. 23.41 + 89 =
  24. 24.32 + 69 =
  25. 25.24 + 74 =
  26. 26.63 + 17 =
  27. 27.30 + 57 =
  28. 28.32 + 67 =
  29. 29.27 + 38 =
  30. 30.55 + 13 =
  31. 31.65 + 28 =
  32. 32.48 + 54 =
  33. 33.47 + 21 =
  34. 34.81 + 53 =
  35. 35.48 + 73 =
  36. 36.63 + 77 =
  37. 37.36 + 51 =
  38. 38.68 + 36 =
  39. 39.73 + 29 =
  40. 40.56 + 16 =

Answer key

  1. 107
  2. 56
  3. 108
  4. 94
  5. 97
  6. 68
  7. 106
  8. 122
  9. 130
  10. 36
  11. 104
  12. 92
  13. 110
  14. 60
  15. 115
  16. 119
  17. 88
  18. 112
  19. 156
  20. 118
  21. 141
  22. 75
  23. 130
  24. 101
  25. 98
  26. 80
  27. 87
  28. 99
  29. 65
  30. 68
  31. 93
  32. 102
  33. 68
  34. 134
  35. 121
  36. 140
  37. 87
  38. 104
  39. 102
  40. 72

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