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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 659 · 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. 1.32 + 18 =
  2. 2.23 + 33 =
  3. 3.75 + 62 =
  4. 4.69 + 41 =
  5. 5.76 + 34 =
  6. 6.68 + 82 =
  7. 7.36 + 63 =
  8. 8.49 + 86 =
  9. 9.53 + 53 =
  10. 10.40 + 14 =
  11. 11.82 + 27 =
  12. 12.54 + 71 =
  13. 13.52 + 43 =
  14. 14.53 + 52 =
  15. 15.52 + 46 =
  16. 16.66 + 48 =
  17. 17.32 + 73 =
  18. 18.35 + 24 =
  19. 19.37 + 75 =
  20. 20.31 + 44 =
  21. 21.37 + 72 =
  22. 22.86 + 52 =
  23. 23.85 + 31 =
  24. 24.23 + 84 =
  25. 25.68 + 72 =
  26. 26.84 + 46 =
  27. 27.80 + 82 =
  28. 28.70 + 28 =
  29. 29.36 + 76 =
  30. 30.28 + 71 =
  31. 31.74 + 85 =
  32. 32.87 + 23 =
  33. 33.76 + 68 =
  34. 34.68 + 88 =
  35. 35.45 + 41 =
  36. 36.88 + 34 =
  37. 37.80 + 75 =
  38. 38.31 + 21 =
  39. 39.38 + 27 =
  40. 40.44 + 31 =

Answer key

  1. 50
  2. 56
  3. 137
  4. 110
  5. 110
  6. 150
  7. 99
  8. 135
  9. 106
  10. 54
  11. 109
  12. 125
  13. 95
  14. 105
  15. 98
  16. 114
  17. 105
  18. 59
  19. 112
  20. 75
  21. 109
  22. 138
  23. 116
  24. 107
  25. 140
  26. 130
  27. 162
  28. 98
  29. 112
  30. 99
  31. 159
  32. 110
  33. 144
  34. 156
  35. 86
  36. 122
  37. 155
  38. 52
  39. 65
  40. 75

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