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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 261 · 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. 1.58 + 65 =
  2. 2.44 + 49 =
  3. 3.82 + 19 =
  4. 4.72 + 66 =
  5. 5.28 + 59 =
  6. 6.43 + 38 =
  7. 7.29 + 26 =
  8. 8.52 + 44 =
  9. 9.50 + 88 =
  10. 10.33 + 21 =
  11. 11.27 + 45 =
  12. 12.37 + 17 =
  13. 13.72 + 51 =
  14. 14.69 + 85 =
  15. 15.68 + 49 =
  16. 16.81 + 86 =
  17. 17.43 + 49 =
  18. 18.38 + 14 =
  19. 19.84 + 43 =
  20. 20.58 + 17 =
  21. 21.86 + 18 =
  22. 22.70 + 56 =
  23. 23.82 + 21 =
  24. 24.89 + 27 =
  25. 25.29 + 41 =
  26. 26.31 + 27 =
  27. 27.70 + 57 =
  28. 28.49 + 37 =
  29. 29.26 + 52 =
  30. 30.23 + 58 =
  31. 31.54 + 47 =
  32. 32.76 + 68 =
  33. 33.51 + 58 =
  34. 34.38 + 74 =
  35. 35.21 + 23 =
  36. 36.71 + 53 =
  37. 37.69 + 23 =
  38. 38.67 + 31 =
  39. 39.67 + 48 =
  40. 40.45 + 28 =

Answer key

  1. 123
  2. 93
  3. 101
  4. 138
  5. 87
  6. 81
  7. 55
  8. 96
  9. 138
  10. 54
  11. 72
  12. 54
  13. 123
  14. 154
  15. 117
  16. 167
  17. 92
  18. 52
  19. 127
  20. 75
  21. 104
  22. 126
  23. 103
  24. 116
  25. 70
  26. 58
  27. 127
  28. 86
  29. 78
  30. 81
  31. 101
  32. 144
  33. 109
  34. 112
  35. 44
  36. 124
  37. 92
  38. 98
  39. 115
  40. 73

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