# 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 view a sample question. To start practicing, just click on any link. IXL will track your score, and the questions will automatically increase in difficulty as you improve!

## Kindergarten skills

- I.1Add with pictures - sums up to 5
- I.2Addition sentences - sums up to 5
- I.3Add two numbers - sums up to 5
- I.4Make a number using addition - sums up to 5
- I.5Complete the addition sentence - sums up to 5
- I.6Addition word problems - sums up to 5
- J.1Add with pictures - sums up to 10
- J.2Addition sentences - sums up to 10
- J.3Add two numbers - sums up to 10
- J.4Make a number using addition - sums up to 10
- J.5Complete the addition sentence - make ten
- J.6Complete the addition sentence - sums up to 10
- J.7Write addition sentences
- J.8Addition word problems - sums up to 10
- U.1Sum and difference

## First-grade skills

- B.1Add with pictures - sums up to 10
- B.2Addition sentences - sums up to 10
- B.3Addition sentences using number lines - sums up to 10
- B.4Adding zero
- C.1Adding 1
- C.2Adding 2
- C.3Adding 3
- C.4Adding 4
- C.5Adding 5
- C.6Adding 6
- C.7Adding 7
- C.8Adding 8
- C.9Adding 9
- C.10Adding 0
- D.1Addition facts - sums up to 10
- D.2Make a number using addition - sums up to 10
- D.3Complete the addition sentence - sums up to 10
- D.4Ways to make a number - addition sentences
- D.5Addition word problems - sums up to 10
- D.6Addition sentences for word problems - sums up to 10
- D.7Addition sentences using number lines - sums up to 18
- D.8Addition facts - sums up to 18
- D.9Addition word problems - sums up to 18
- D.10Addition sentences for word problems - sums up to 18
- D.11Addition facts - sums up to 20
- D.12Make a number using addition - sums up to 20
- D.13Addition sentences for word problems - sums up to 20
- D.14Related addition facts
- D.15Addition sentences: true or false?
- D.16Add a one-digit number to a two-digit number - without regrouping
- D.17Regroup tens and ones - ways to make a number
- D.18Regroup tens and ones
- D.19Add a one-digit number to a two-digit number - with regrouping
- E.1Add doubles - with models
- E.2Add doubles
- E.3Add doubles - complete the sentence
- E.4Add using doubles plus one
- E.5Add using doubles minus one
- E.6Add three numbers - use doubles
- E.7Complete the addition sentence - make ten
- E.8Add three numbers - make ten
- E.9Add two multiples of ten
- E.10Add a multiple of ten
- E.11Add three numbers
- E.12Add three numbers - word problems
- I.1Relate addition and subtraction sentences
- J.1Addition and subtraction - ways to make a number
- J.2Which sign makes the number sentence true?
- J.3Fact families
- J.4Addition and subtraction facts - numbers up to 10
- J.5Addition and subtraction facts - numbers up to 18
- J.6Addition and subtraction word problems
- J.7Addition and subtraction sentences: true or false?
- J.8Ten more or less
- J.9Add and subtract tens
- J.10Addition and subtraction terms

## Second-grade skills

- E.1Review - add one-digit numbers - sums to 10
- E.2Review - ways to make a number - sums to 10
- E.3Review - writing addition sentences - sums to 10
- E.4Addition with pictures - sums to 20
- E.5Write addition sentences to describe pictures - sums to 20
- E.6Add one-digit numbers
- E.7Addition input/output tables - sums to 20
- E.8Add zero
- E.9Add doubles using models
- E.10Add doubles
- E.11Add doubles - complete the sentence
- E.12Addition word problems - one digit
- E.13Complete the addition sentence - one digit
- E.14Write the addition sentence - one digit
- E.15Balance addition equations - one digit
- E.16Addition equations: true or false?
- E.17Add three one-digit numbers
- E.18Add three one-digit numbers: word problems
- E.19Add four or more one-digit numbers
- E.20Add four or more one-digit numbers: word problems
- E.21Identify repeated addition in arrays: sums to 10
- E.22Write addition sentences for arrays: sums to 10
- E.23Identify repeated addition in arrays: sums to 25
- E.24Write addition sentences for arrays: sums to 25
- G.1Add multiples of 10
- G.2Write addition sentences to describe pictures
- G.3Add a two-digit and a one-digit number - without regrouping
- G.4Add a two-digit and a one-digit number - with regrouping
- G.5Add two two-digit numbers - without regrouping
- G.6Add two two-digit numbers - with regrouping
- G.7Addition input/output tables - up to two digits
- G.8Ways to make a number using addition
- G.9Addition word problems - up to two digits
- G.10Complete the addition sentence - up to two digits
- G.11Write the addition sentence - up to two digits
- G.12Balance addition equations - up to two digits
- G.13Add three numbers up to two digits each
- G.14Add three numbers up to two digits each: word problems
- G.15Add four or more numbers up to two digits each
- G.16Add four or more numbers up to two digits each: word problems
- I.1Add multiples of 100
- I.2Addition with three-digit numbers
- I.3Addition input/output tables - up to three digits
- I.4Addition word problems - up to three digits
- I.5Complete the addition sentence - up to three digits
- I.6Write the addition sentence - up to three digits
- I.7Balance addition equations - up to three digits
- K.1Related addition facts
- K.3Fact families
- K.5Solve inequalities using addition and subtraction shortcuts
- L.1Add and subtract numbers up to 20
- L.2Addition and subtraction - ways to make a number - up to 20
- L.3Addition and subtraction word problems - up to 20
- L.4Addition and subtraction - balance equations - up to 20
- L.5Addition and subtraction equations up to 20: true or false?
- L.6Input/output tables - write the rule - up to 20
- L.7Add and subtract numbers up to 100
- L.8Addition and subtraction - ways to make a number - up to 100
- L.9Addition and subtraction word problems - up to 100
- L.10Addition and subtraction - balance equations - up to 100
- L.11Input/output tables - write the rule - up to 100
- L.12Which sign (+ or -) makes the number sentence true?
- L.13Write addition and subtraction sentences
- L.14Inequalities with addition and subtraction - up to 100
- N.5Estimate sums
- P.9Add money - up to $1
- P.10Add money - up to $1: word problems
- P.13Add and subtract money - up to $1
- P.14Add and subtract money - up to $1: word problems

## Third-grade skills

- A.12Comparing - with addition and subtraction
- A.13Multi-step inequalities
- C.1Add two numbers up to three digits
- C.2Addition input/output tables - up to three digits
- C.3Add two numbers up to three digits - word problems
- C.4Complete the addition sentence - up to three digits
- C.5Balance addition equations - up to three digits
- C.6Add three numbers up to three digits each
- C.7Add three numbers up to three digits each: word problems
- C.8Addition patterns over increasing place values
- C.9Add two numbers with four or more digits
- C.10Addition input/output tables - four or more digits
- C.11Add two numbers with four or more digits - word problems
- C.12Complete the addition sentence - four or more digits
- C.13Balance equations - four or more digits
- C.14Add three or more numbers with four or more digits
- C.15Add three or more numbers with four or more digits - word problems
- C.16Addition: fill in the missing digits
- N.3Properties of addition
- N.4Solve using properties of addition
- N.9Relate addition and multiplication
- P.5Estimate sums up to 1,000
- P.6Estimate sums
- S.7Add and subtract money amounts
- S.8Add money amounts - word problems
- Z.6Add fractions with like denominators using number lines
- AA.6Add and subtract decimals
- AA.7Add and subtract decimals - word problems
- AA.8Add three or more decimals

## Fourth-grade skills

- B.1Add numbers up to millions
- B.2Add numbers up to millions: word problems
- B.3Addition: fill in the missing digits
- B.4Properties of addition
- B.5Add 3 or more numbers up to millions
- B.6Addition patterns over increasing place values
- B.7Choose numbers with a particular sum
- B.8Estimate sums
- B.9Estimate sums: word problems
- F.8Mentally add and subtract numbers ending in zeroes
- M.4Add and subtract money amounts
- M.7Price lists with addition and subtraction
- N.18Add and subtract metric mixed units
- Q.4Add fractions with like denominators using number lines
- Q.7Add and subtract fractions with like denominators
- Q.8Compare sums and differences of fractions with like denominators
- Q.9Add and subtract fractions with like denominators: word problems
- Q.11Add 3 or more fractions with like denominators
- Q.12Add and subtract mixed numbers with like denominators
- R.1Add fractions with unlike denominators using models
- R.2Add fractions with unlike denominators
- R.5Add up to 4 fractions with denominators of 10 and 100
- R.6Add and subtract fractions with denominators of 10, 100, and 1000
- R.7Add and subtract fractions with unlike denominators: word problems
- R.11Add 3 or more fractions with unlike denominators
- R.12Add 3 or more fractions with like and unlike denominators: word problems
- R.13Find the missing numerator or denominator in addition and subtraction sentences
- R.14Add and subtract mixed numbers with unlike denominators
- R.15Add and subtract mixed numbers with like and unlike denominators: word problems
- R.16Compare sums and differences of fractions
- U.1Add decimal numbers
- U.3Add and subtract decimals: word problems
- U.4Choose decimals with a particular sum or difference
- U.5Add 3 or more decimals
- U.6Add 3 or more decimals: word problems
- U.7Complete the addition or subtraction sentence
- U.8Inequalities with addition and subtraction
- U.9Estimate sums and differences of decimals

## Fifth-grade skills

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

## Sixth-grade skills

- A.4Add and subtract whole numbers
- A.5Add and subtract whole numbers: word problems
- G.1Add and subtract decimal numbers
- G.2Add and subtract decimals: word problems
- G.3Estimate sums and differences of decimals
- G.4Maps with decimal distances
- J.1Add and subtract fractions with like denominators
- J.2Add and subtract fractions with like denominators: word problems
- J.3Add and subtract fractions with unlike denominators
- J.4Add and subtract fractions with unlike denominators: word problems
- J.5Inequalities with addition and subtraction of like and unlike fractions
- J.6Add and subtract mixed numbers
- J.7Add and subtract mixed numbers: word problems
- J.8Estimate sums and differences of mixed numbers
- J.9Maps with fractional distances
- N.1Add integers using counters
- N.2Add integers
- N.5Add and subtract integers: find the sign
- N.6Add and subtract integers: input/output tables
- N.7Add three or more integers
- P.4Add and subtract rational numbers
- U.2Add and subtract money amounts
- U.3Add and subtract money amounts: word problems
- Y.7Properties of addition

## Seventh-grade skills

- C.1Integer addition and subtraction rules
- C.2Add and subtract integers using counters
- C.3Add and subtract integers
- C.4Complete addition and subtraction equations with integers
- C.5Add and subtract integers: word problems
- E.1Add and subtract decimals
- E.2Add and subtract decimals: word problems
- E.10Maps with decimal distances
- G.1Add and subtract fractions
- G.2Add and subtract fractions: word problems
- G.3Add and subtract mixed numbers
- G.4Add and subtract mixed numbers: word problems
- G.5Inequalities with addition and subtraction of fractions and mixed numbers
- G.6Estimate sums and differences of mixed numbers
- G.17Maps with fractional distances
- H.6Add and subtract rational numbers
- H.7Apply addition and subtraction rules
- R.8Properties of addition and multiplication

## Eighth-grade skills

- C.1Integer addition and subtraction rules
- C.2Add and subtract integers using counters
- C.3Add and subtract integers
- C.4Add and subtract three or more integers
- C.5Add and subtract integers: word problems
- E.2Add and subtract rational numbers
- E.3Add and subtract rational numbers: word problems
- E.4Apply addition and subtraction rules
- E.8Apply addition, subtraction, multiplication, and division rules
- V.10Properties of addition and multiplication
- W.12Solve equations: word problems