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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 267 · 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. 1.63 + 54 =
  2. 2.80 + 36 =
  3. 3.47 + 81 =
  4. 4.24 + 25 =
  5. 5.65 + 31 =
  6. 6.24 + 13 =
  7. 7.31 + 49 =
  8. 8.33 + 54 =
  9. 9.34 + 43 =
  10. 10.81 + 77 =
  11. 11.65 + 38 =
  12. 12.41 + 35 =
  13. 13.40 + 83 =
  14. 14.86 + 51 =
  15. 15.36 + 71 =
  16. 16.67 + 25 =
  17. 17.82 + 63 =
  18. 18.54 + 72 =
  19. 19.59 + 84 =
  20. 20.30 + 45 =
  21. 21.60 + 31 =
  22. 22.29 + 25 =
  23. 23.29 + 52 =
  24. 24.38 + 73 =
  25. 25.58 + 32 =
  26. 26.26 + 81 =
  27. 27.84 + 72 =
  28. 28.76 + 62 =
  29. 29.50 + 88 =
  30. 30.60 + 16 =
  31. 31.82 + 41 =
  32. 32.35 + 73 =
  33. 33.69 + 88 =
  34. 34.23 + 33 =
  35. 35.56 + 68 =
  36. 36.85 + 24 =
  37. 37.30 + 38 =
  38. 38.33 + 64 =
  39. 39.21 + 33 =
  40. 40.49 + 85 =

Answer key

  1. 117
  2. 116
  3. 128
  4. 49
  5. 96
  6. 37
  7. 80
  8. 87
  9. 77
  10. 158
  11. 103
  12. 76
  13. 123
  14. 137
  15. 107
  16. 92
  17. 145
  18. 126
  19. 143
  20. 75
  21. 91
  22. 54
  23. 81
  24. 111
  25. 90
  26. 107
  27. 156
  28. 138
  29. 138
  30. 76
  31. 123
  32. 108
  33. 157
  34. 56
  35. 124
  36. 109
  37. 68
  38. 97
  39. 54
  40. 134

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