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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 562 · 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. 1.68 + 74 =
  2. 2.44 + 81 =
  3. 3.64 + 81 =
  4. 4.48 + 15 =
  5. 5.72 + 19 =
  6. 6.61 + 17 =
  7. 7.40 + 68 =
  8. 8.85 + 61 =
  9. 9.22 + 18 =
  10. 10.78 + 36 =
  11. 11.24 + 19 =
  12. 12.87 + 38 =
  13. 13.72 + 21 =
  14. 14.24 + 34 =
  15. 15.81 + 42 =
  16. 16.84 + 44 =
  17. 17.64 + 24 =
  18. 18.45 + 27 =
  19. 19.42 + 82 =
  20. 20.21 + 67 =
  21. 21.88 + 59 =
  22. 22.23 + 62 =
  23. 23.57 + 86 =
  24. 24.73 + 21 =
  25. 25.60 + 51 =
  26. 26.70 + 18 =
  27. 27.77 + 22 =
  28. 28.71 + 34 =
  29. 29.73 + 26 =
  30. 30.43 + 31 =
  31. 31.43 + 13 =
  32. 32.27 + 31 =
  33. 33.87 + 66 =
  34. 34.51 + 58 =
  35. 35.62 + 56 =
  36. 36.81 + 21 =
  37. 37.53 + 27 =
  38. 38.63 + 23 =
  39. 39.73 + 33 =
  40. 40.50 + 24 =

Answer key

  1. 142
  2. 125
  3. 145
  4. 63
  5. 91
  6. 78
  7. 108
  8. 146
  9. 40
  10. 114
  11. 43
  12. 125
  13. 93
  14. 58
  15. 123
  16. 128
  17. 88
  18. 72
  19. 124
  20. 88
  21. 147
  22. 85
  23. 143
  24. 94
  25. 111
  26. 88
  27. 99
  28. 105
  29. 99
  30. 74
  31. 56
  32. 58
  33. 153
  34. 109
  35. 118
  36. 102
  37. 80
  38. 86
  39. 106
  40. 74

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