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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 768 · 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. 1.54 + 67 =
  2. 2.28 + 88 =
  3. 3.35 + 12 =
  4. 4.78 + 42 =
  5. 5.77 + 27 =
  6. 6.84 + 37 =
  7. 7.21 + 41 =
  8. 8.63 + 75 =
  9. 9.26 + 24 =
  10. 10.76 + 84 =
  11. 11.50 + 77 =
  12. 12.63 + 56 =
  13. 13.36 + 72 =
  14. 14.54 + 66 =
  15. 15.68 + 35 =
  16. 16.31 + 62 =
  17. 17.28 + 49 =
  18. 18.36 + 41 =
  19. 19.54 + 21 =
  20. 20.42 + 15 =
  21. 21.46 + 73 =
  22. 22.74 + 21 =
  23. 23.53 + 31 =
  24. 24.89 + 29 =
  25. 25.26 + 18 =
  26. 26.33 + 19 =
  27. 27.72 + 69 =
  28. 28.62 + 29 =
  29. 29.64 + 26 =
  30. 30.60 + 38 =
  31. 31.36 + 81 =
  32. 32.65 + 74 =
  33. 33.62 + 44 =
  34. 34.32 + 17 =
  35. 35.41 + 83 =
  36. 36.81 + 44 =
  37. 37.42 + 26 =
  38. 38.36 + 28 =
  39. 39.28 + 24 =
  40. 40.81 + 55 =

Answer key

  1. 121
  2. 116
  3. 47
  4. 120
  5. 104
  6. 121
  7. 62
  8. 138
  9. 50
  10. 160
  11. 127
  12. 119
  13. 108
  14. 120
  15. 103
  16. 93
  17. 77
  18. 77
  19. 75
  20. 57
  21. 119
  22. 95
  23. 84
  24. 118
  25. 44
  26. 52
  27. 141
  28. 91
  29. 90
  30. 98
  31. 117
  32. 139
  33. 106
  34. 49
  35. 124
  36. 125
  37. 68
  38. 64
  39. 52
  40. 136

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