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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 511 · 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. 1.34 + 34 =
  2. 2.43 + 15 =
  3. 3.27 + 38 =
  4. 4.28 + 38 =
  5. 5.30 + 28 =
  6. 6.68 + 17 =
  7. 7.48 + 88 =
  8. 8.59 + 63 =
  9. 9.28 + 67 =
  10. 10.30 + 51 =
  11. 11.86 + 63 =
  12. 12.70 + 36 =
  13. 13.75 + 12 =
  14. 14.21 + 64 =
  15. 15.29 + 43 =
  16. 16.61 + 75 =
  17. 17.76 + 61 =
  18. 18.75 + 54 =
  19. 19.29 + 85 =
  20. 20.86 + 18 =
  21. 21.61 + 51 =
  22. 22.26 + 45 =
  23. 23.37 + 45 =
  24. 24.68 + 26 =
  25. 25.75 + 24 =
  26. 26.62 + 87 =
  27. 27.26 + 62 =
  28. 28.54 + 84 =
  29. 29.83 + 43 =
  30. 30.72 + 37 =
  31. 31.28 + 75 =
  32. 32.83 + 22 =
  33. 33.26 + 51 =
  34. 34.71 + 89 =
  35. 35.88 + 67 =
  36. 36.45 + 27 =
  37. 37.40 + 72 =
  38. 38.71 + 64 =
  39. 39.77 + 45 =
  40. 40.36 + 27 =

Answer key

  1. 68
  2. 58
  3. 65
  4. 66
  5. 58
  6. 85
  7. 136
  8. 122
  9. 95
  10. 81
  11. 149
  12. 106
  13. 87
  14. 85
  15. 72
  16. 136
  17. 137
  18. 129
  19. 114
  20. 104
  21. 112
  22. 71
  23. 82
  24. 94
  25. 99
  26. 149
  27. 88
  28. 138
  29. 126
  30. 109
  31. 103
  32. 105
  33. 77
  34. 160
  35. 155
  36. 72
  37. 112
  38. 135
  39. 122
  40. 63

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