Addition

Here is a list of all of the skills that cover addition! These skills are organized by grade, and you can move your mouse over any skill name to preview the skill. To start practicing, just click on any link. IXL will track your score, and the questions will automatically increase in difficulty as you improve!

Here is a list of all of the skills that cover addition! To start practicing, just click on any link.

First-grade skills

  1. B.1 Add with pictures - sums up to 10
  2. B.2 Addition sentences - sums up to 10
  3. B.3 Addition sentences using number lines - sums up to 10
  4. B.4 Adding zero
  5. C.1 Adding 1
  6. C.2 Adding 2
  7. C.3 Adding 3
  8. C.4 Adding 4
  9. C.5 Adding 5
  10. C.6 Adding 6
  11. C.7 Adding 7
  12. C.8 Adding 8
  13. C.9 Adding 9
  14. C.10 Adding 0
  15. D.1 Addition facts - sums up to 10
  16. D.2 Make a number using addition - sums up to 10
  17. D.3 Complete the addition sentence - sums up to 10
  18. D.4 Ways to make a number - addition sentences
  19. D.5 Addition word problems - sums up to 10
  20. D.6 Addition sentences for word problems - sums up to 10
  21. D.7 Addition sentences using number lines - sums up to 18
  22. D.8 Addition facts - sums up to 18
  23. D.9 Addition word problems - sums up to 18
  24. D.10 Addition sentences for word problems - sums up to 18
  25. D.11 Addition facts - sums up to 20
  26. D.12 Make a number using addition - sums up to 20
  27. D.13 Addition sentences for word problems - sums up to 20
  28. D.14 Related addition facts
  29. D.15 Addition sentences: true or false?
  30. D.16 Add a one-digit number to a two-digit number - without regrouping
  31. D.17 Regroup tens and ones - ways to make a number
  32. D.18 Regroup tens and ones
  33. D.19 Add a one-digit number to a two-digit number - with regrouping
  34. E.1 Add doubles - with models
  35. E.2 Add doubles
  36. E.3 Add doubles - complete the sentence
  37. E.4 Add using doubles plus one
  38. E.5 Add using doubles minus one
  39. E.6 Add three numbers - use doubles
  40. E.7 Complete the addition sentence - make ten
  41. E.8 Add three numbers - make ten
  42. E.9 Add two multiples of ten
  43. E.10 Add a multiple of ten
  44. E.11 Add three numbers
  45. E.12 Add three numbers - word problems
  46. I.1 Relate addition and subtraction sentences
  47. J.1 Addition and subtraction - ways to make a number
  48. J.2 Which sign makes the number sentence true?
  49. J.3 Fact families
  50. J.4 Addition and subtraction facts - numbers up to 10
  51. J.5 Addition and subtraction facts - numbers up to 18
  52. J.6 Addition and subtraction word problems
  53. J.7 Addition and subtraction sentences: true or false?
  54. J.8 Ten more or less
  55. J.9 Add and subtract tens
  56. J.10 Addition and subtraction terms

Second-grade skills

  1. E.1 Review - add one-digit numbers - sums to 10
  2. E.2 Review - ways to make a number - sums to 10
  3. E.3 Review - writing addition sentences - sums to 10
  4. E.4 Addition with pictures - sums to 20
  5. E.5 Write addition sentences to describe pictures - sums to 20
  6. E.6 Addition sentences using number lines - sums up to 20
  7. E.7 Add one-digit numbers
  8. E.8 Addition input/output tables - sums to 20
  9. E.9 Add zero
  10. E.10 Add doubles using models
  11. E.11 Add doubles
  12. E.12 Add doubles - complete the sentence
  13. E.13 Addition word problems - one digit
  14. E.14 Complete the addition sentence - one digit
  15. E.15 Write the addition sentence - one digit
  16. E.16 Balance addition equations - one digit
  17. E.17 Addition equations: true or false?
  18. E.18 Add three one-digit numbers
  19. E.19 Add three one-digit numbers: word problems
  20. E.20 Add four or more one-digit numbers
  21. E.21 Add four or more one-digit numbers: word problems
  22. E.22 Identify repeated addition in arrays: sums to 10
  23. E.23 Write addition sentences for arrays: sums to 10
  24. E.24 Identify repeated addition in arrays: sums to 25
  25. E.25 Write addition sentences for arrays: sums to 25
  26. G.1 Add multiples of 10
  27. G.2 Write addition sentences to describe pictures
  28. G.3 Add a two-digit and a one-digit number - without regrouping
  29. G.4 Add a two-digit and a one-digit number - with regrouping
  30. G.5 Add two two-digit numbers - without regrouping
  31. G.6 Add two two-digit numbers - with regrouping
  32. G.7 Addition input/output tables - up to two digits
  33. G.8 Ways to make a number using addition
  34. G.9 Addition word problems - up to two digits
  35. G.10 Complete the addition sentence - up to two digits
  36. G.11 Write the addition sentence - up to two digits
  37. G.12 Balance addition equations - up to two digits
  38. G.13 Add three numbers up to two digits each
  39. G.14 Add three numbers up to two digits each: word problems
  40. G.15 Add four or more numbers up to two digits each
  41. G.16 Add four or more numbers up to two digits each: word problems
  42. I.1 Add multiples of 100
  43. I.2 Add multiples of 10 or 100
  44. I.3 Addition with three-digit numbers
  45. I.4 Addition input/output tables - up to three digits
  46. I.5 Addition word problems - up to three digits
  47. I.6 Complete the addition sentence - up to three digits
  48. I.7 Write the addition sentence - up to three digits
  49. I.8 Balance addition equations - up to three digits
  50. K.1 Related addition facts
  51. K.3 Fact families
  52. K.5 Solve inequalities using addition and subtraction shortcuts
  53. L.1 Add and subtract numbers up to 20
  54. L.2 Addition and subtraction - ways to make a number - up to 20
  55. L.3 Addition and subtraction word problems - up to 20
  56. L.4 Addition and subtraction - balance equations - up to 20
  57. L.5 Addition and subtraction equations up to 20: true or false?
  58. L.6 Input/output tables - write the rule - up to 20
  59. L.7 Input/output tables - add and subtract by 10
  60. L.8 Add and subtract numbers up to 100
  61. L.9 Addition and subtraction - ways to make a number - up to 100
  62. L.10 Addition and subtraction word problems - up to 100
  63. L.11 Addition and subtraction - balance equations - up to 100
  64. L.12 Input/output tables - write the rule - up to 100
  65. L.13 Input/output tables - add and subtract by 100
  66. L.14 Input/output tables - add and subtract by 10 or 100
  67. L.15 Which sign (+ or -) makes the number sentence true?
  68. L.16 Write addition and subtraction sentences
  69. L.17 Inequalities with addition and subtraction - up to 100
  70. N.5 Estimate sums
  71. P.9 Add money - up to $1
  72. P.10 Add money - up to $1: word problems
  73. P.13 Add and subtract money - up to $1
  74. P.14 Add and subtract money - up to $1: word problems

Fourth-grade skills

  1. B.1 Add numbers up to hundred thousands
  2. B.2 Add numbers up to millions
  3. B.3 Add numbers up to hundred thousands: word problems
  4. B.4 Add numbers up to millions: word problems
  5. B.5 Addition: fill in the missing digits
  6. B.6 Properties of addition
  7. B.7 Add 3 or more numbers up to millions
  8. B.8 Addition patterns over increasing place values
  9. B.9 Choose numbers with a particular sum
  10. B.10 Estimate sums
  11. B.11 Estimate sums: word problems
  12. F.8 Mentally add and subtract numbers ending in zeroes
  13. M.4 Add and subtract money amounts
  14. M.7 Price lists with addition and subtraction
  15. N.18 Add and subtract metric mixed units
  16. Q.4 Add fractions with like denominators using number lines
  17. Q.5 Add fractions with like denominators
  18. Q.9 Add and subtract fractions with like denominators
  19. Q.10 Compare sums and differences of fractions with like denominators
  20. Q.11 Add and subtract fractions with like denominators: word problems
  21. Q.13 Add 3 or more fractions with like denominators
  22. Q.14 Add and subtract mixed numbers with like denominators
  23. R.1 Add fractions with unlike denominators using models
  24. R.2 Add fractions with unlike denominators
  25. R.5 Add fractions with denominators of 10 and 100
  26. R.6 Add and subtract fractions with denominators of 10, 100, and 1000
  27. R.7 Add and subtract fractions with unlike denominators: word problems
  28. R.11 Add 3 or more fractions with unlike denominators
  29. R.12 Add 3 or more fractions with like and unlike denominators: word problems
  30. R.13 Find the missing numerator or denominator in addition and subtraction sentences
  31. R.14 Add and subtract mixed numbers with unlike denominators
  32. R.15 Add and subtract mixed numbers with like and unlike denominators: word problems
  33. R.16 Compare sums and differences of fractions
  34. U.1 Add decimal numbers
  35. U.3 Add and subtract decimals: word problems
  36. U.4 Choose decimals with a particular sum or difference
  37. U.5 Add 3 or more decimals
  38. U.6 Add 3 or more decimals: word problems
  39. U.7 Complete the addition or subtraction sentence
  40. U.8 Inequalities with addition and subtraction
  41. U.9 Estimate sums and differences of decimals

Fifth-grade skills

  1. B.1 Add and subtract whole numbers up to billions
  2. B.2 Add and subtract whole numbers: word problems
  3. B.3 Complete addition and subtraction sentences
  4. B.4 Fill in the missing digits
  5. B.5 Choose numbers with a particular sum or difference
  6. B.6 Properties of addition
  7. B.7 Inequalities with addition and subtraction
  8. B.8 Estimate sums and differences of whole numbers
  9. B.9 Estimate sums and differences: word problems
  10. H.1 Add decimal numbers
  11. H.3 Add and subtract decimal numbers
  12. H.4 Add and subtract decimals: word problems
  13. H.5 Choose decimals with a particular sum or difference
  14. H.6 Complete the addition or subtraction sentence
  15. H.7 Inequalities with decimal addition and subtraction
  16. H.8 Estimate sums and differences of decimals
  17. L.2 Add and subtract fractions with like denominators using number lines
  18. L.3 Add and subtract fractions with like denominators
  19. L.4 Add and subtract fractions with like denominators: word problems
  20. L.5 Add and subtract mixed numbers with like denominators
  21. L.6 Add fractions with unlike denominators using models
  22. L.7 Add up to 4 fractions with denominators of 10 and 100
  23. L.8 Add fractions with unlike denominators
  24. L.11 Add and subtract fractions with unlike denominators: word problems
  25. L.12 Add 3 or more fractions with unlike denominators
  26. L.13 Add 3 or more fractions: word problems
  27. L.15 Complete addition and subtraction sentences with fractions
  28. L.16 Inequalities with addition and subtraction of fractions
  29. L.17 Estimate sums and differences of mixed numbers
  30. L.18 Add mixed numbers with unlike denominators
  31. L.20 Add and subtract mixed numbers: word problems
  32. L.22 Complete addition and subtraction sentences with mixed numbers
  33. L.23 Inequalities with addition and subtraction of mixed numbers
  34. S.1 Add and subtract money amounts
  35. S.2 Add and subtract money: word problems
  36. Z.18 Add and subtract metric mixed units