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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 216 · 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. 1.78 + 88 =
  2. 2.86 + 66 =
  3. 3.84 + 46 =
  4. 4.26 + 19 =
  5. 5.29 + 14 =
  6. 6.77 + 62 =
  7. 7.70 + 27 =
  8. 8.70 + 45 =
  9. 9.76 + 12 =
  10. 10.72 + 54 =
  11. 11.79 + 58 =
  12. 12.66 + 69 =
  13. 13.24 + 19 =
  14. 14.32 + 54 =
  15. 15.46 + 28 =
  16. 16.63 + 71 =
  17. 17.71 + 26 =
  18. 18.79 + 36 =
  19. 19.38 + 58 =
  20. 20.62 + 15 =
  21. 21.62 + 21 =
  22. 22.23 + 29 =
  23. 23.47 + 62 =
  24. 24.28 + 21 =
  25. 25.29 + 76 =
  26. 26.64 + 63 =
  27. 27.80 + 52 =
  28. 28.31 + 34 =
  29. 29.26 + 63 =
  30. 30.40 + 73 =
  31. 31.32 + 29 =
  32. 32.53 + 88 =
  33. 33.71 + 27 =
  34. 34.31 + 65 =
  35. 35.49 + 25 =
  36. 36.84 + 34 =
  37. 37.21 + 36 =
  38. 38.73 + 29 =
  39. 39.47 + 18 =
  40. 40.46 + 22 =

Answer key

  1. 166
  2. 152
  3. 130
  4. 45
  5. 43
  6. 139
  7. 97
  8. 115
  9. 88
  10. 126
  11. 137
  12. 135
  13. 43
  14. 86
  15. 74
  16. 134
  17. 97
  18. 115
  19. 96
  20. 77
  21. 83
  22. 52
  23. 109
  24. 49
  25. 105
  26. 127
  27. 132
  28. 65
  29. 89
  30. 113
  31. 61
  32. 141
  33. 98
  34. 96
  35. 74
  36. 118
  37. 57
  38. 102
  39. 65
  40. 68

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