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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 759 · 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 + 45 =
  2. 2.67 + 83 =
  3. 3.56 + 87 =
  4. 4.55 + 41 =
  5. 5.56 + 24 =
  6. 6.54 + 14 =
  7. 7.79 + 73 =
  8. 8.34 + 58 =
  9. 9.78 + 71 =
  10. 10.63 + 29 =
  11. 11.64 + 81 =
  12. 12.22 + 85 =
  13. 13.23 + 41 =
  14. 14.60 + 51 =
  15. 15.31 + 14 =
  16. 16.75 + 44 =
  17. 17.22 + 15 =
  18. 18.57 + 33 =
  19. 19.74 + 53 =
  20. 20.38 + 48 =
  21. 21.71 + 51 =
  22. 22.69 + 88 =
  23. 23.47 + 37 =
  24. 24.75 + 64 =
  25. 25.87 + 34 =
  26. 26.63 + 61 =
  27. 27.51 + 73 =
  28. 28.39 + 41 =
  29. 29.86 + 32 =
  30. 30.74 + 48 =
  31. 31.58 + 18 =
  32. 32.42 + 67 =
  33. 33.65 + 76 =
  34. 34.38 + 42 =
  35. 35.24 + 52 =
  36. 36.43 + 51 =
  37. 37.41 + 55 =
  38. 38.81 + 35 =
  39. 39.72 + 18 =
  40. 40.59 + 87 =

Answer key

  1. 99
  2. 150
  3. 143
  4. 96
  5. 80
  6. 68
  7. 152
  8. 92
  9. 149
  10. 92
  11. 145
  12. 107
  13. 64
  14. 111
  15. 45
  16. 119
  17. 37
  18. 90
  19. 127
  20. 86
  21. 122
  22. 157
  23. 84
  24. 139
  25. 121
  26. 124
  27. 124
  28. 80
  29. 118
  30. 122
  31. 76
  32. 109
  33. 141
  34. 80
  35. 76
  36. 94
  37. 96
  38. 116
  39. 90
  40. 146

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