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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 646 · 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. 1.30 + 24 =
  2. 2.63 + 18 =
  3. 3.32 + 48 =
  4. 4.25 + 27 =
  5. 5.72 + 73 =
  6. 6.33 + 76 =
  7. 7.33 + 44 =
  8. 8.72 + 71 =
  9. 9.43 + 28 =
  10. 10.28 + 83 =
  11. 11.87 + 17 =
  12. 12.68 + 69 =
  13. 13.79 + 33 =
  14. 14.59 + 82 =
  15. 15.61 + 65 =
  16. 16.51 + 48 =
  17. 17.47 + 42 =
  18. 18.64 + 17 =
  19. 19.59 + 79 =
  20. 20.30 + 37 =
  21. 21.63 + 38 =
  22. 22.26 + 62 =
  23. 23.60 + 62 =
  24. 24.37 + 44 =
  25. 25.48 + 49 =
  26. 26.43 + 84 =
  27. 27.21 + 35 =
  28. 28.55 + 71 =
  29. 29.76 + 77 =
  30. 30.31 + 45 =
  31. 31.60 + 71 =
  32. 32.72 + 72 =
  33. 33.60 + 75 =
  34. 34.76 + 58 =
  35. 35.79 + 77 =
  36. 36.36 + 26 =
  37. 37.22 + 59 =
  38. 38.32 + 27 =
  39. 39.34 + 64 =
  40. 40.43 + 51 =

Answer key

  1. 54
  2. 81
  3. 80
  4. 52
  5. 145
  6. 109
  7. 77
  8. 143
  9. 71
  10. 111
  11. 104
  12. 137
  13. 112
  14. 141
  15. 126
  16. 99
  17. 89
  18. 81
  19. 138
  20. 67
  21. 101
  22. 88
  23. 122
  24. 81
  25. 97
  26. 127
  27. 56
  28. 126
  29. 153
  30. 76
  31. 131
  32. 144
  33. 135
  34. 134
  35. 156
  36. 62
  37. 81
  38. 59
  39. 98
  40. 94

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