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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 836 · 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. 1.77 + 88 =
  2. 2.87 + 74 =
  3. 3.68 + 66 =
  4. 4.82 + 16 =
  5. 5.85 + 43 =
  6. 6.49 + 25 =
  7. 7.76 + 73 =
  8. 8.80 + 25 =
  9. 9.72 + 85 =
  10. 10.66 + 34 =
  11. 11.28 + 71 =
  12. 12.79 + 33 =
  13. 13.87 + 62 =
  14. 14.79 + 86 =
  15. 15.81 + 31 =
  16. 16.60 + 53 =
  17. 17.65 + 69 =
  18. 18.21 + 42 =
  19. 19.55 + 17 =
  20. 20.74 + 88 =
  21. 21.72 + 64 =
  22. 22.22 + 46 =
  23. 23.40 + 31 =
  24. 24.44 + 61 =
  25. 25.75 + 68 =
  26. 26.28 + 43 =
  27. 27.42 + 19 =
  28. 28.72 + 46 =
  29. 29.36 + 26 =
  30. 30.78 + 22 =
  31. 31.88 + 34 =
  32. 32.35 + 57 =
  33. 33.34 + 76 =
  34. 34.72 + 34 =
  35. 35.38 + 22 =
  36. 36.58 + 41 =
  37. 37.78 + 33 =
  38. 38.25 + 81 =
  39. 39.51 + 21 =
  40. 40.21 + 26 =

Answer key

  1. 165
  2. 161
  3. 134
  4. 98
  5. 128
  6. 74
  7. 149
  8. 105
  9. 157
  10. 100
  11. 99
  12. 112
  13. 149
  14. 165
  15. 112
  16. 113
  17. 134
  18. 63
  19. 72
  20. 162
  21. 136
  22. 68
  23. 71
  24. 105
  25. 143
  26. 71
  27. 61
  28. 118
  29. 62
  30. 100
  31. 122
  32. 92
  33. 110
  34. 106
  35. 60
  36. 99
  37. 111
  38. 106
  39. 72
  40. 47

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