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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 395 · 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. 1.77 + 71 =
  2. 2.47 + 15 =
  3. 3.74 + 86 =
  4. 4.68 + 32 =
  5. 5.41 + 51 =
  6. 6.29 + 21 =
  7. 7.54 + 12 =
  8. 8.81 + 71 =
  9. 9.75 + 74 =
  10. 10.36 + 62 =
  11. 11.27 + 17 =
  12. 12.23 + 17 =
  13. 13.45 + 21 =
  14. 14.39 + 28 =
  15. 15.55 + 47 =
  16. 16.71 + 58 =
  17. 17.21 + 12 =
  18. 18.50 + 26 =
  19. 19.76 + 56 =
  20. 20.56 + 82 =
  21. 21.72 + 71 =
  22. 22.67 + 51 =
  23. 23.24 + 48 =
  24. 24.63 + 85 =
  25. 25.49 + 39 =
  26. 26.84 + 77 =
  27. 27.32 + 42 =
  28. 28.39 + 31 =
  29. 29.57 + 31 =
  30. 30.41 + 38 =
  31. 31.35 + 41 =
  32. 32.41 + 41 =
  33. 33.27 + 76 =
  34. 34.84 + 21 =
  35. 35.73 + 47 =
  36. 36.67 + 18 =
  37. 37.70 + 51 =
  38. 38.89 + 45 =
  39. 39.40 + 27 =
  40. 40.61 + 27 =

Answer key

  1. 148
  2. 62
  3. 160
  4. 100
  5. 92
  6. 50
  7. 66
  8. 152
  9. 149
  10. 98
  11. 44
  12. 40
  13. 66
  14. 67
  15. 102
  16. 129
  17. 33
  18. 76
  19. 132
  20. 138
  21. 143
  22. 118
  23. 72
  24. 148
  25. 88
  26. 161
  27. 74
  28. 70
  29. 88
  30. 79
  31. 76
  32. 82
  33. 103
  34. 105
  35. 120
  36. 85
  37. 121
  38. 134
  39. 67
  40. 88

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