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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 33 · 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. 1.35 + 35 =
  2. 2.40 + 51 =
  3. 3.75 + 84 =
  4. 4.52 + 34 =
  5. 5.72 + 19 =
  6. 6.88 + 87 =
  7. 7.21 + 81 =
  8. 8.39 + 53 =
  9. 9.57 + 41 =
  10. 10.55 + 47 =
  11. 11.24 + 17 =
  12. 12.48 + 68 =
  13. 13.47 + 81 =
  14. 14.36 + 89 =
  15. 15.35 + 45 =
  16. 16.87 + 47 =
  17. 17.79 + 79 =
  18. 18.84 + 47 =
  19. 19.67 + 81 =
  20. 20.61 + 27 =
  21. 21.54 + 88 =
  22. 22.33 + 61 =
  23. 23.65 + 33 =
  24. 24.88 + 71 =
  25. 25.60 + 49 =
  26. 26.63 + 47 =
  27. 27.67 + 52 =
  28. 28.69 + 69 =
  29. 29.30 + 61 =
  30. 30.26 + 43 =
  31. 31.61 + 45 =
  32. 32.39 + 19 =
  33. 33.34 + 41 =
  34. 34.30 + 14 =
  35. 35.61 + 38 =
  36. 36.29 + 14 =
  37. 37.39 + 86 =
  38. 38.24 + 41 =
  39. 39.63 + 16 =
  40. 40.32 + 19 =

Answer key

  1. 70
  2. 91
  3. 159
  4. 86
  5. 91
  6. 175
  7. 102
  8. 92
  9. 98
  10. 102
  11. 41
  12. 116
  13. 128
  14. 125
  15. 80
  16. 134
  17. 158
  18. 131
  19. 148
  20. 88
  21. 142
  22. 94
  23. 98
  24. 159
  25. 109
  26. 110
  27. 119
  28. 138
  29. 91
  30. 69
  31. 106
  32. 58
  33. 75
  34. 44
  35. 99
  36. 43
  37. 125
  38. 65
  39. 79
  40. 51

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