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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 525 · 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. 1.37 + 19 =
  2. 2.75 + 69 =
  3. 3.86 + 79 =
  4. 4.68 + 34 =
  5. 5.53 + 26 =
  6. 6.22 + 24 =
  7. 7.33 + 32 =
  8. 8.28 + 52 =
  9. 9.30 + 27 =
  10. 10.47 + 38 =
  11. 11.28 + 85 =
  12. 12.71 + 89 =
  13. 13.74 + 54 =
  14. 14.49 + 15 =
  15. 15.76 + 37 =
  16. 16.42 + 12 =
  17. 17.21 + 34 =
  18. 18.25 + 29 =
  19. 19.46 + 22 =
  20. 20.58 + 12 =
  21. 21.66 + 53 =
  22. 22.52 + 69 =
  23. 23.26 + 75 =
  24. 24.71 + 15 =
  25. 25.44 + 22 =
  26. 26.50 + 51 =
  27. 27.29 + 37 =
  28. 28.37 + 76 =
  29. 29.47 + 19 =
  30. 30.29 + 22 =
  31. 31.78 + 23 =
  32. 32.76 + 39 =
  33. 33.65 + 76 =
  34. 34.29 + 59 =
  35. 35.60 + 15 =
  36. 36.21 + 45 =
  37. 37.83 + 58 =
  38. 38.75 + 71 =
  39. 39.70 + 54 =
  40. 40.52 + 51 =

Answer key

  1. 56
  2. 144
  3. 165
  4. 102
  5. 79
  6. 46
  7. 65
  8. 80
  9. 57
  10. 85
  11. 113
  12. 160
  13. 128
  14. 64
  15. 113
  16. 54
  17. 55
  18. 54
  19. 68
  20. 70
  21. 119
  22. 121
  23. 101
  24. 86
  25. 66
  26. 101
  27. 66
  28. 113
  29. 66
  30. 51
  31. 101
  32. 115
  33. 141
  34. 88
  35. 75
  36. 66
  37. 141
  38. 146
  39. 124
  40. 103

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