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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 147 · 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. 1.52 + 34 =
  2. 2.79 + 79 =
  3. 3.72 + 46 =
  4. 4.27 + 21 =
  5. 5.26 + 24 =
  6. 6.77 + 76 =
  7. 7.35 + 21 =
  8. 8.58 + 53 =
  9. 9.22 + 54 =
  10. 10.64 + 39 =
  11. 11.21 + 75 =
  12. 12.24 + 36 =
  13. 13.88 + 57 =
  14. 14.73 + 14 =
  15. 15.52 + 66 =
  16. 16.23 + 62 =
  17. 17.28 + 46 =
  18. 18.66 + 12 =
  19. 19.86 + 83 =
  20. 20.65 + 48 =
  21. 21.73 + 27 =
  22. 22.75 + 57 =
  23. 23.46 + 39 =
  24. 24.23 + 73 =
  25. 25.42 + 75 =
  26. 26.68 + 13 =
  27. 27.42 + 21 =
  28. 28.36 + 88 =
  29. 29.23 + 13 =
  30. 30.68 + 66 =
  31. 31.32 + 72 =
  32. 32.55 + 86 =
  33. 33.28 + 39 =
  34. 34.28 + 34 =
  35. 35.24 + 15 =
  36. 36.60 + 55 =
  37. 37.44 + 32 =
  38. 38.31 + 67 =
  39. 39.60 + 52 =
  40. 40.88 + 13 =

Answer key

  1. 86
  2. 158
  3. 118
  4. 48
  5. 50
  6. 153
  7. 56
  8. 111
  9. 76
  10. 103
  11. 96
  12. 60
  13. 145
  14. 87
  15. 118
  16. 85
  17. 74
  18. 78
  19. 169
  20. 113
  21. 100
  22. 132
  23. 85
  24. 96
  25. 117
  26. 81
  27. 63
  28. 124
  29. 36
  30. 134
  31. 104
  32. 141
  33. 67
  34. 62
  35. 39
  36. 115
  37. 76
  38. 98
  39. 112
  40. 101

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