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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 818 · 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. 1.26 + 33 =
  2. 2.84 + 58 =
  3. 3.23 + 86 =
  4. 4.82 + 52 =
  5. 5.80 + 69 =
  6. 6.65 + 82 =
  7. 7.31 + 12 =
  8. 8.67 + 71 =
  9. 9.56 + 71 =
  10. 10.58 + 43 =
  11. 11.39 + 73 =
  12. 12.25 + 14 =
  13. 13.37 + 43 =
  14. 14.61 + 16 =
  15. 15.70 + 57 =
  16. 16.34 + 42 =
  17. 17.82 + 83 =
  18. 18.35 + 86 =
  19. 19.62 + 33 =
  20. 20.47 + 25 =
  21. 21.35 + 83 =
  22. 22.88 + 41 =
  23. 23.80 + 81 =
  24. 24.53 + 29 =
  25. 25.52 + 41 =
  26. 26.46 + 25 =
  27. 27.38 + 38 =
  28. 28.37 + 46 =
  29. 29.87 + 17 =
  30. 30.75 + 31 =
  31. 31.73 + 25 =
  32. 32.26 + 54 =
  33. 33.35 + 42 =
  34. 34.69 + 83 =
  35. 35.83 + 61 =
  36. 36.23 + 31 =
  37. 37.48 + 16 =
  38. 38.65 + 18 =
  39. 39.88 + 35 =
  40. 40.69 + 56 =

Answer key

  1. 59
  2. 142
  3. 109
  4. 134
  5. 149
  6. 147
  7. 43
  8. 138
  9. 127
  10. 101
  11. 112
  12. 39
  13. 80
  14. 77
  15. 127
  16. 76
  17. 165
  18. 121
  19. 95
  20. 72
  21. 118
  22. 129
  23. 161
  24. 82
  25. 93
  26. 71
  27. 76
  28. 83
  29. 104
  30. 106
  31. 98
  32. 80
  33. 77
  34. 152
  35. 144
  36. 54
  37. 64
  38. 83
  39. 123
  40. 125

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