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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 258 · 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. 1.36 + 84 =
  2. 2.49 + 71 =
  3. 3.60 + 25 =
  4. 4.38 + 49 =
  5. 5.79 + 41 =
  6. 6.61 + 86 =
  7. 7.82 + 17 =
  8. 8.47 + 28 =
  9. 9.68 + 89 =
  10. 10.22 + 48 =
  11. 11.46 + 58 =
  12. 12.21 + 25 =
  13. 13.76 + 22 =
  14. 14.43 + 71 =
  15. 15.27 + 33 =
  16. 16.60 + 45 =
  17. 17.28 + 84 =
  18. 18.63 + 64 =
  19. 19.84 + 61 =
  20. 20.73 + 42 =
  21. 21.63 + 63 =
  22. 22.67 + 15 =
  23. 23.65 + 57 =
  24. 24.69 + 47 =
  25. 25.49 + 16 =
  26. 26.79 + 88 =
  27. 27.89 + 12 =
  28. 28.57 + 27 =
  29. 29.29 + 45 =
  30. 30.34 + 16 =
  31. 31.26 + 18 =
  32. 32.28 + 33 =
  33. 33.67 + 21 =
  34. 34.51 + 79 =
  35. 35.32 + 15 =
  36. 36.28 + 15 =
  37. 37.58 + 19 =
  38. 38.74 + 54 =
  39. 39.80 + 74 =
  40. 40.38 + 78 =

Answer key

  1. 120
  2. 120
  3. 85
  4. 87
  5. 120
  6. 147
  7. 99
  8. 75
  9. 157
  10. 70
  11. 104
  12. 46
  13. 98
  14. 114
  15. 60
  16. 105
  17. 112
  18. 127
  19. 145
  20. 115
  21. 126
  22. 82
  23. 122
  24. 116
  25. 65
  26. 167
  27. 101
  28. 84
  29. 74
  30. 50
  31. 44
  32. 61
  33. 88
  34. 130
  35. 47
  36. 43
  37. 77
  38. 128
  39. 154
  40. 116

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