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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 630 · 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. 1.23 + 25 =
  2. 2.41 + 33 =
  3. 3.71 + 55 =
  4. 4.58 + 62 =
  5. 5.46 + 74 =
  6. 6.53 + 77 =
  7. 7.46 + 71 =
  8. 8.65 + 12 =
  9. 9.37 + 82 =
  10. 10.69 + 14 =
  11. 11.48 + 28 =
  12. 12.53 + 87 =
  13. 13.56 + 71 =
  14. 14.48 + 25 =
  15. 15.38 + 89 =
  16. 16.75 + 55 =
  17. 17.74 + 29 =
  18. 18.65 + 43 =
  19. 19.53 + 51 =
  20. 20.34 + 88 =
  21. 21.44 + 61 =
  22. 22.55 + 51 =
  23. 23.52 + 39 =
  24. 24.73 + 19 =
  25. 25.69 + 75 =
  26. 26.23 + 85 =
  27. 27.39 + 39 =
  28. 28.72 + 81 =
  29. 29.54 + 73 =
  30. 30.27 + 21 =
  31. 31.44 + 39 =
  32. 32.75 + 62 =
  33. 33.83 + 42 =
  34. 34.41 + 59 =
  35. 35.85 + 73 =
  36. 36.25 + 63 =
  37. 37.51 + 31 =
  38. 38.27 + 61 =
  39. 39.38 + 25 =
  40. 40.72 + 18 =

Answer key

  1. 48
  2. 74
  3. 126
  4. 120
  5. 120
  6. 130
  7. 117
  8. 77
  9. 119
  10. 83
  11. 76
  12. 140
  13. 127
  14. 73
  15. 127
  16. 130
  17. 103
  18. 108
  19. 104
  20. 122
  21. 105
  22. 106
  23. 91
  24. 92
  25. 144
  26. 108
  27. 78
  28. 153
  29. 127
  30. 48
  31. 83
  32. 137
  33. 125
  34. 100
  35. 158
  36. 88
  37. 82
  38. 88
  39. 63
  40. 90

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