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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 145 · 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. 1.80 + 18 =
  2. 2.55 + 56 =
  3. 3.23 + 32 =
  4. 4.47 + 41 =
  5. 5.50 + 71 =
  6. 6.58 + 79 =
  7. 7.50 + 54 =
  8. 8.85 + 38 =
  9. 9.27 + 39 =
  10. 10.26 + 52 =
  11. 11.64 + 53 =
  12. 12.24 + 89 =
  13. 13.42 + 26 =
  14. 14.44 + 12 =
  15. 15.64 + 31 =
  16. 16.38 + 18 =
  17. 17.88 + 13 =
  18. 18.38 + 32 =
  19. 19.59 + 75 =
  20. 20.61 + 41 =
  21. 21.82 + 72 =
  22. 22.68 + 18 =
  23. 23.35 + 57 =
  24. 24.85 + 22 =
  25. 25.43 + 21 =
  26. 26.37 + 69 =
  27. 27.45 + 58 =
  28. 28.86 + 15 =
  29. 29.76 + 76 =
  30. 30.32 + 81 =
  31. 31.65 + 29 =
  32. 32.31 + 54 =
  33. 33.66 + 66 =
  34. 34.86 + 27 =
  35. 35.34 + 44 =
  36. 36.49 + 16 =
  37. 37.38 + 12 =
  38. 38.50 + 38 =
  39. 39.61 + 32 =
  40. 40.60 + 31 =

Answer key

  1. 98
  2. 111
  3. 55
  4. 88
  5. 121
  6. 137
  7. 104
  8. 123
  9. 66
  10. 78
  11. 117
  12. 113
  13. 68
  14. 56
  15. 95
  16. 56
  17. 101
  18. 70
  19. 134
  20. 102
  21. 154
  22. 86
  23. 92
  24. 107
  25. 64
  26. 106
  27. 103
  28. 101
  29. 152
  30. 113
  31. 94
  32. 85
  33. 132
  34. 113
  35. 78
  36. 65
  37. 50
  38. 88
  39. 93
  40. 91

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