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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 447 · 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. 1.27 + 16 =
  2. 2.31 + 61 =
  3. 3.21 + 69 =
  4. 4.51 + 12 =
  5. 5.83 + 21 =
  6. 6.45 + 86 =
  7. 7.66 + 21 =
  8. 8.29 + 14 =
  9. 9.60 + 59 =
  10. 10.85 + 88 =
  11. 11.25 + 48 =
  12. 12.40 + 85 =
  13. 13.31 + 22 =
  14. 14.75 + 73 =
  15. 15.49 + 78 =
  16. 16.80 + 86 =
  17. 17.59 + 58 =
  18. 18.82 + 27 =
  19. 19.70 + 63 =
  20. 20.64 + 13 =
  21. 21.61 + 24 =
  22. 22.81 + 45 =
  23. 23.44 + 24 =
  24. 24.67 + 84 =
  25. 25.83 + 18 =
  26. 26.50 + 41 =
  27. 27.87 + 83 =
  28. 28.43 + 79 =
  29. 29.29 + 27 =
  30. 30.76 + 75 =
  31. 31.27 + 22 =
  32. 32.47 + 21 =
  33. 33.87 + 44 =
  34. 34.59 + 57 =
  35. 35.52 + 21 =
  36. 36.87 + 12 =
  37. 37.45 + 44 =
  38. 38.83 + 45 =
  39. 39.67 + 69 =
  40. 40.27 + 48 =

Answer key

  1. 43
  2. 92
  3. 90
  4. 63
  5. 104
  6. 131
  7. 87
  8. 43
  9. 119
  10. 173
  11. 73
  12. 125
  13. 53
  14. 148
  15. 127
  16. 166
  17. 117
  18. 109
  19. 133
  20. 77
  21. 85
  22. 126
  23. 68
  24. 151
  25. 101
  26. 91
  27. 170
  28. 122
  29. 56
  30. 151
  31. 49
  32. 68
  33. 131
  34. 116
  35. 73
  36. 99
  37. 89
  38. 128
  39. 136
  40. 75

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