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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 486 · 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. 1.23 + 22 =
  2. 2.40 + 81 =
  3. 3.30 + 37 =
  4. 4.32 + 76 =
  5. 5.29 + 54 =
  6. 6.40 + 28 =
  7. 7.24 + 51 =
  8. 8.65 + 33 =
  9. 9.37 + 71 =
  10. 10.59 + 34 =
  11. 11.86 + 71 =
  12. 12.34 + 25 =
  13. 13.68 + 71 =
  14. 14.80 + 84 =
  15. 15.58 + 21 =
  16. 16.62 + 21 =
  17. 17.21 + 71 =
  18. 18.69 + 22 =
  19. 19.76 + 33 =
  20. 20.23 + 66 =
  21. 21.85 + 72 =
  22. 22.67 + 89 =
  23. 23.21 + 41 =
  24. 24.72 + 49 =
  25. 25.65 + 32 =
  26. 26.28 + 87 =
  27. 27.84 + 85 =
  28. 28.62 + 41 =
  29. 29.22 + 61 =
  30. 30.53 + 68 =
  31. 31.54 + 44 =
  32. 32.43 + 63 =
  33. 33.29 + 72 =
  34. 34.84 + 27 =
  35. 35.65 + 55 =
  36. 36.82 + 87 =
  37. 37.29 + 44 =
  38. 38.29 + 81 =
  39. 39.68 + 85 =
  40. 40.22 + 29 =

Answer key

  1. 45
  2. 121
  3. 67
  4. 108
  5. 83
  6. 68
  7. 75
  8. 98
  9. 108
  10. 93
  11. 157
  12. 59
  13. 139
  14. 164
  15. 79
  16. 83
  17. 92
  18. 91
  19. 109
  20. 89
  21. 157
  22. 156
  23. 62
  24. 121
  25. 97
  26. 115
  27. 169
  28. 103
  29. 83
  30. 121
  31. 98
  32. 106
  33. 101
  34. 111
  35. 120
  36. 169
  37. 73
  38. 110
  39. 153
  40. 51

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