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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 442 · 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. 1.66 + 58 =
  2. 2.47 + 65 =
  3. 3.63 + 54 =
  4. 4.35 + 57 =
  5. 5.31 + 69 =
  6. 6.73 + 69 =
  7. 7.59 + 35 =
  8. 8.30 + 48 =
  9. 9.83 + 17 =
  10. 10.21 + 88 =
  11. 11.22 + 64 =
  12. 12.26 + 22 =
  13. 13.61 + 66 =
  14. 14.49 + 15 =
  15. 15.31 + 53 =
  16. 16.34 + 61 =
  17. 17.59 + 81 =
  18. 18.67 + 31 =
  19. 19.53 + 23 =
  20. 20.45 + 24 =
  21. 21.63 + 85 =
  22. 22.21 + 79 =
  23. 23.45 + 25 =
  24. 24.28 + 85 =
  25. 25.44 + 42 =
  26. 26.76 + 24 =
  27. 27.57 + 76 =
  28. 28.74 + 86 =
  29. 29.37 + 18 =
  30. 30.39 + 28 =
  31. 31.88 + 63 =
  32. 32.49 + 31 =
  33. 33.43 + 47 =
  34. 34.60 + 66 =
  35. 35.60 + 49 =
  36. 36.64 + 34 =
  37. 37.38 + 52 =
  38. 38.44 + 15 =
  39. 39.27 + 87 =
  40. 40.22 + 76 =

Answer key

  1. 124
  2. 112
  3. 117
  4. 92
  5. 100
  6. 142
  7. 94
  8. 78
  9. 100
  10. 109
  11. 86
  12. 48
  13. 127
  14. 64
  15. 84
  16. 95
  17. 140
  18. 98
  19. 76
  20. 69
  21. 148
  22. 100
  23. 70
  24. 113
  25. 86
  26. 100
  27. 133
  28. 160
  29. 55
  30. 67
  31. 151
  32. 80
  33. 90
  34. 126
  35. 109
  36. 98
  37. 90
  38. 59
  39. 114
  40. 98

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