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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 711 · 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 + 63 =
  2. 2.39 + 32 =
  3. 3.30 + 37 =
  4. 4.89 + 61 =
  5. 5.48 + 88 =
  6. 6.74 + 54 =
  7. 7.42 + 83 =
  8. 8.84 + 17 =
  9. 9.74 + 29 =
  10. 10.48 + 34 =
  11. 11.86 + 61 =
  12. 12.54 + 19 =
  13. 13.34 + 59 =
  14. 14.68 + 69 =
  15. 15.60 + 61 =
  16. 16.43 + 18 =
  17. 17.37 + 26 =
  18. 18.85 + 83 =
  19. 19.76 + 64 =
  20. 20.81 + 61 =
  21. 21.26 + 76 =
  22. 22.45 + 38 =
  23. 23.51 + 38 =
  24. 24.50 + 71 =
  25. 25.68 + 57 =
  26. 26.52 + 41 =
  27. 27.74 + 83 =
  28. 28.57 + 25 =
  29. 29.38 + 61 =
  30. 30.21 + 81 =
  31. 31.64 + 45 =
  32. 32.68 + 32 =
  33. 33.63 + 32 =
  34. 34.21 + 27 =
  35. 35.36 + 74 =
  36. 36.86 + 31 =
  37. 37.39 + 51 =
  38. 38.34 + 49 =
  39. 39.85 + 24 =
  40. 40.45 + 24 =

Answer key

  1. 143
  2. 71
  3. 67
  4. 150
  5. 136
  6. 128
  7. 125
  8. 101
  9. 103
  10. 82
  11. 147
  12. 73
  13. 93
  14. 137
  15. 121
  16. 61
  17. 63
  18. 168
  19. 140
  20. 142
  21. 102
  22. 83
  23. 89
  24. 121
  25. 125
  26. 93
  27. 157
  28. 82
  29. 99
  30. 102
  31. 109
  32. 100
  33. 95
  34. 48
  35. 110
  36. 117
  37. 90
  38. 83
  39. 109
  40. 69

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