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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 829 · 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. 1.22 + 75 =
  2. 2.43 + 51 =
  3. 3.29 + 52 =
  4. 4.29 + 14 =
  5. 5.28 + 69 =
  6. 6.72 + 21 =
  7. 7.72 + 19 =
  8. 8.85 + 33 =
  9. 9.21 + 29 =
  10. 10.56 + 23 =
  11. 11.80 + 22 =
  12. 12.43 + 89 =
  13. 13.61 + 28 =
  14. 14.39 + 83 =
  15. 15.71 + 55 =
  16. 16.89 + 26 =
  17. 17.23 + 51 =
  18. 18.24 + 48 =
  19. 19.88 + 18 =
  20. 20.89 + 22 =
  21. 21.70 + 68 =
  22. 22.77 + 57 =
  23. 23.23 + 87 =
  24. 24.33 + 65 =
  25. 25.27 + 24 =
  26. 26.87 + 79 =
  27. 27.51 + 57 =
  28. 28.37 + 37 =
  29. 29.40 + 75 =
  30. 30.37 + 31 =
  31. 31.36 + 47 =
  32. 32.79 + 21 =
  33. 33.77 + 66 =
  34. 34.63 + 37 =
  35. 35.59 + 86 =
  36. 36.31 + 17 =
  37. 37.70 + 33 =
  38. 38.50 + 67 =
  39. 39.58 + 31 =
  40. 40.61 + 85 =

Answer key

  1. 97
  2. 94
  3. 81
  4. 43
  5. 97
  6. 93
  7. 91
  8. 118
  9. 50
  10. 79
  11. 102
  12. 132
  13. 89
  14. 122
  15. 126
  16. 115
  17. 74
  18. 72
  19. 106
  20. 111
  21. 138
  22. 134
  23. 110
  24. 98
  25. 51
  26. 166
  27. 108
  28. 74
  29. 115
  30. 68
  31. 83
  32. 100
  33. 143
  34. 100
  35. 145
  36. 48
  37. 103
  38. 117
  39. 89
  40. 146

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