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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 740 · 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. 1.48 + 88 =
  2. 2.64 + 62 =
  3. 3.25 + 15 =
  4. 4.27 + 28 =
  5. 5.84 + 64 =
  6. 6.60 + 62 =
  7. 7.52 + 78 =
  8. 8.49 + 24 =
  9. 9.49 + 78 =
  10. 10.64 + 61 =
  11. 11.53 + 26 =
  12. 12.78 + 21 =
  13. 13.21 + 52 =
  14. 14.71 + 31 =
  15. 15.53 + 51 =
  16. 16.67 + 51 =
  17. 17.68 + 58 =
  18. 18.25 + 86 =
  19. 19.72 + 84 =
  20. 20.41 + 17 =
  21. 21.57 + 81 =
  22. 22.58 + 29 =
  23. 23.25 + 75 =
  24. 24.26 + 37 =
  25. 25.37 + 52 =
  26. 26.27 + 79 =
  27. 27.39 + 88 =
  28. 28.48 + 72 =
  29. 29.53 + 62 =
  30. 30.59 + 12 =
  31. 31.80 + 41 =
  32. 32.81 + 41 =
  33. 33.84 + 77 =
  34. 34.41 + 86 =
  35. 35.30 + 26 =
  36. 36.81 + 29 =
  37. 37.85 + 68 =
  38. 38.23 + 28 =
  39. 39.77 + 89 =
  40. 40.76 + 83 =

Answer key

  1. 136
  2. 126
  3. 40
  4. 55
  5. 148
  6. 122
  7. 130
  8. 73
  9. 127
  10. 125
  11. 79
  12. 99
  13. 73
  14. 102
  15. 104
  16. 118
  17. 126
  18. 111
  19. 156
  20. 58
  21. 138
  22. 87
  23. 100
  24. 63
  25. 89
  26. 106
  27. 127
  28. 120
  29. 115
  30. 71
  31. 121
  32. 122
  33. 161
  34. 127
  35. 56
  36. 110
  37. 153
  38. 51
  39. 166
  40. 159

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