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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 148 · 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. 1.41 + 47 =
  2. 2.39 + 81 =
  3. 3.58 + 22 =
  4. 4.68 + 76 =
  5. 5.77 + 71 =
  6. 6.78 + 74 =
  7. 7.46 + 48 =
  8. 8.64 + 21 =
  9. 9.48 + 41 =
  10. 10.32 + 28 =
  11. 11.45 + 26 =
  12. 12.44 + 22 =
  13. 13.36 + 45 =
  14. 14.21 + 18 =
  15. 15.82 + 34 =
  16. 16.46 + 34 =
  17. 17.65 + 53 =
  18. 18.75 + 13 =
  19. 19.69 + 26 =
  20. 20.58 + 71 =
  21. 21.77 + 43 =
  22. 22.80 + 34 =
  23. 23.67 + 57 =
  24. 24.66 + 69 =
  25. 25.65 + 63 =
  26. 26.76 + 65 =
  27. 27.68 + 31 =
  28. 28.25 + 51 =
  29. 29.28 + 46 =
  30. 30.87 + 36 =
  31. 31.39 + 31 =
  32. 32.86 + 63 =
  33. 33.78 + 31 =
  34. 34.68 + 53 =
  35. 35.62 + 66 =
  36. 36.71 + 42 =
  37. 37.48 + 42 =
  38. 38.44 + 32 =
  39. 39.66 + 21 =
  40. 40.23 + 46 =

Answer key

  1. 88
  2. 120
  3. 80
  4. 144
  5. 148
  6. 152
  7. 94
  8. 85
  9. 89
  10. 60
  11. 71
  12. 66
  13. 81
  14. 39
  15. 116
  16. 80
  17. 118
  18. 88
  19. 95
  20. 129
  21. 120
  22. 114
  23. 124
  24. 135
  25. 128
  26. 141
  27. 99
  28. 76
  29. 74
  30. 123
  31. 70
  32. 149
  33. 109
  34. 121
  35. 128
  36. 113
  37. 90
  38. 76
  39. 87
  40. 69

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