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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 278 · 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. 1.80 + 73 =
  2. 2.61 + 31 =
  3. 3.54 + 89 =
  4. 4.59 + 24 =
  5. 5.89 + 19 =
  6. 6.24 + 26 =
  7. 7.68 + 53 =
  8. 8.30 + 13 =
  9. 9.52 + 81 =
  10. 10.49 + 21 =
  11. 11.57 + 22 =
  12. 12.21 + 81 =
  13. 13.30 + 71 =
  14. 14.78 + 18 =
  15. 15.85 + 31 =
  16. 16.31 + 86 =
  17. 17.75 + 89 =
  18. 18.23 + 77 =
  19. 19.22 + 76 =
  20. 20.27 + 88 =
  21. 21.66 + 86 =
  22. 22.30 + 26 =
  23. 23.33 + 52 =
  24. 24.53 + 85 =
  25. 25.71 + 44 =
  26. 26.36 + 29 =
  27. 27.64 + 22 =
  28. 28.28 + 23 =
  29. 29.35 + 41 =
  30. 30.44 + 59 =
  31. 31.46 + 78 =
  32. 32.27 + 74 =
  33. 33.53 + 23 =
  34. 34.77 + 75 =
  35. 35.63 + 24 =
  36. 36.26 + 15 =
  37. 37.30 + 12 =
  38. 38.84 + 22 =
  39. 39.57 + 19 =
  40. 40.28 + 65 =

Answer key

  1. 153
  2. 92
  3. 143
  4. 83
  5. 108
  6. 50
  7. 121
  8. 43
  9. 133
  10. 70
  11. 79
  12. 102
  13. 101
  14. 96
  15. 116
  16. 117
  17. 164
  18. 100
  19. 98
  20. 115
  21. 152
  22. 56
  23. 85
  24. 138
  25. 115
  26. 65
  27. 86
  28. 51
  29. 76
  30. 103
  31. 124
  32. 101
  33. 76
  34. 152
  35. 87
  36. 41
  37. 42
  38. 106
  39. 76
  40. 93

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