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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 468 · 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. 1.78 + 56 =
  2. 2.77 + 69 =
  3. 3.80 + 25 =
  4. 4.55 + 24 =
  5. 5.79 + 19 =
  6. 6.82 + 32 =
  7. 7.52 + 14 =
  8. 8.21 + 78 =
  9. 9.61 + 59 =
  10. 10.34 + 26 =
  11. 11.55 + 55 =
  12. 12.73 + 77 =
  13. 13.79 + 25 =
  14. 14.62 + 36 =
  15. 15.52 + 78 =
  16. 16.77 + 87 =
  17. 17.86 + 32 =
  18. 18.25 + 61 =
  19. 19.62 + 63 =
  20. 20.63 + 33 =
  21. 21.33 + 87 =
  22. 22.30 + 68 =
  23. 23.27 + 21 =
  24. 24.76 + 54 =
  25. 25.48 + 71 =
  26. 26.33 + 16 =
  27. 27.67 + 23 =
  28. 28.70 + 82 =
  29. 29.72 + 24 =
  30. 30.31 + 21 =
  31. 31.33 + 31 =
  32. 32.81 + 51 =
  33. 33.25 + 85 =
  34. 34.40 + 33 =
  35. 35.29 + 31 =
  36. 36.51 + 75 =
  37. 37.82 + 79 =
  38. 38.81 + 82 =
  39. 39.49 + 84 =
  40. 40.37 + 23 =

Answer key

  1. 134
  2. 146
  3. 105
  4. 79
  5. 98
  6. 114
  7. 66
  8. 99
  9. 120
  10. 60
  11. 110
  12. 150
  13. 104
  14. 98
  15. 130
  16. 164
  17. 118
  18. 86
  19. 125
  20. 96
  21. 120
  22. 98
  23. 48
  24. 130
  25. 119
  26. 49
  27. 90
  28. 152
  29. 96
  30. 52
  31. 64
  32. 132
  33. 110
  34. 73
  35. 60
  36. 126
  37. 161
  38. 163
  39. 133
  40. 60

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