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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 329 · 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 + 76 =
  2. 2.50 + 81 =
  3. 3.53 + 61 =
  4. 4.42 + 34 =
  5. 5.45 + 62 =
  6. 6.36 + 35 =
  7. 7.58 + 14 =
  8. 8.44 + 71 =
  9. 9.38 + 59 =
  10. 10.21 + 48 =
  11. 11.21 + 31 =
  12. 12.26 + 56 =
  13. 13.25 + 57 =
  14. 14.52 + 76 =
  15. 15.56 + 33 =
  16. 16.45 + 74 =
  17. 17.25 + 83 =
  18. 18.30 + 82 =
  19. 19.56 + 58 =
  20. 20.48 + 68 =
  21. 21.31 + 16 =
  22. 22.22 + 28 =
  23. 23.29 + 14 =
  24. 24.32 + 67 =
  25. 25.75 + 15 =
  26. 26.67 + 25 =
  27. 27.80 + 84 =
  28. 28.28 + 81 =
  29. 29.34 + 21 =
  30. 30.58 + 71 =
  31. 31.76 + 41 =
  32. 32.36 + 68 =
  33. 33.50 + 13 =
  34. 34.21 + 35 =
  35. 35.49 + 51 =
  36. 36.74 + 51 =
  37. 37.66 + 67 =
  38. 38.75 + 82 =
  39. 39.47 + 66 =
  40. 40.62 + 43 =

Answer key

  1. 110
  2. 131
  3. 114
  4. 76
  5. 107
  6. 71
  7. 72
  8. 115
  9. 97
  10. 69
  11. 52
  12. 82
  13. 82
  14. 128
  15. 89
  16. 119
  17. 108
  18. 112
  19. 114
  20. 116
  21. 47
  22. 50
  23. 43
  24. 99
  25. 90
  26. 92
  27. 164
  28. 109
  29. 55
  30. 129
  31. 117
  32. 104
  33. 63
  34. 56
  35. 100
  36. 125
  37. 133
  38. 157
  39. 113
  40. 105

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