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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 638 · 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. 1.24 + 69 =
  2. 2.47 + 31 =
  3. 3.26 + 65 =
  4. 4.23 + 72 =
  5. 5.25 + 21 =
  6. 6.82 + 78 =
  7. 7.73 + 28 =
  8. 8.75 + 37 =
  9. 9.25 + 37 =
  10. 10.60 + 25 =
  11. 11.35 + 73 =
  12. 12.22 + 86 =
  13. 13.24 + 49 =
  14. 14.24 + 28 =
  15. 15.79 + 32 =
  16. 16.23 + 22 =
  17. 17.29 + 13 =
  18. 18.76 + 29 =
  19. 19.57 + 76 =
  20. 20.70 + 41 =
  21. 21.87 + 48 =
  22. 22.28 + 12 =
  23. 23.63 + 68 =
  24. 24.31 + 27 =
  25. 25.72 + 13 =
  26. 26.88 + 73 =
  27. 27.29 + 72 =
  28. 28.31 + 36 =
  29. 29.34 + 87 =
  30. 30.49 + 26 =
  31. 31.75 + 12 =
  32. 32.59 + 82 =
  33. 33.51 + 64 =
  34. 34.40 + 19 =
  35. 35.48 + 31 =
  36. 36.33 + 57 =
  37. 37.27 + 71 =
  38. 38.37 + 51 =
  39. 39.42 + 17 =
  40. 40.40 + 12 =

Answer key

  1. 93
  2. 78
  3. 91
  4. 95
  5. 46
  6. 160
  7. 101
  8. 112
  9. 62
  10. 85
  11. 108
  12. 108
  13. 73
  14. 52
  15. 111
  16. 45
  17. 42
  18. 105
  19. 133
  20. 111
  21. 135
  22. 40
  23. 131
  24. 58
  25. 85
  26. 161
  27. 101
  28. 67
  29. 121
  30. 75
  31. 87
  32. 141
  33. 115
  34. 59
  35. 79
  36. 90
  37. 98
  38. 88
  39. 59
  40. 52

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