Adding Tenths and Hundredths Fractions Worksheets for Grade 4

Pick a step in Sheet type, from 3/10 = 30/100 to 7/10 + 45/100 = 1 15/100, then press Print.

Sheet type

Problems

Answer key

12 problems. Tenths + two-digit hundredths. Sheet C6SZGW, with its answer key.

Tenths + two-digit hundredths

Name Date Score / 12

Add. Rename the fractions with a common denominator first. Write each answer just as it comes out. There is no need to reduce it.

1. + = ________
2. + = ________
3. + = ________
4. + = ________
5. + = ________
6. + = ________
7. + = ________
8. + = ________
9. + = ________
10. + = ________
11. + = ________
12. + = ________

Sheet C6SZGW · Made at homeroomtools.com

Answer key. Tenths + two-digit hundredths

1. + = + =
2. + = + =
3. + = + =
4. + = + =
5. + = + =
6. + = + =
7. + = + =
8. + = + =
9. + = + =
10. + = + =
11. + = + =
12. + = + =

Sheet C6SZGW · Made at homeroomtools.com

Next step See every grade 4 fraction sheet See the other 4th grade math sheets

How it works

Free adding tenths and hundredths fractions worksheets for one grade 4 skill: renaming tenths as hundredths, so that 3/10 + 27/100 becomes 30/100 + 27/100 = 57/100. Sheet type runs from the renaming step alone to sums past one whole. Make a new sheet changes the numbers.

Read the full guide

One standard, and why the key keeps hundredths

Common Core 4.NF.5 asks fourth graders to express a fraction with denominator 10 as an equivalent fraction with denominator 100. Pupils then use that to add. Its example is 3/10 + 4/100 = 34/100. A footnote says unlike denominators in general are not required in grade 4. The standard leaves 34/100 alone, and so do these keys: 17/50 is equal, but it hides the link to 0.34. To leave the key off, clear Answer key.

If you teach in Texas

The Texas standards have no match for this skill as fraction addition. Grade 4 there adds fractions with equal denominators only, 4.3(E). It relates decimals to fractions that name tenths and hundredths, 4.2(G), and adds decimals to the hundredths place, 4.4(A).

Start with Tenths as hundredths even if it looks too easy. Almost every other sheet opens with that step.
Tenths + single-digit hundredths has a pattern, 3/10 + 4/100 = 34/100. Tenths + two-digit hundredths breaks it.
A pupil who answers 30/110 has added the denominators too. Go back to Like denominators warm-up, tenths or hundredths.

Questions and answers

How do you add tenths and hundredths?

Rename the tenths as hundredths: multiply the numerator and the denominator by 10. Then add the numerators and keep the denominator 100: 6/10 + 13/100 = 60/100 + 13/100 = 73/100. Past 100 the sum is more than one whole: 7/10 + 45/100 = 115/100 = 1 15/100.

Why is 3/10 equal to 30/100?

Cutting each tenth into 10 equal pieces gives hundredths: 3 tenths become 30 hundredths, and the amount has not changed. Multiplying the numerator and the denominator by 10 records that cut. It is why 0.3 and 0.30 are the same number.

What grade adds tenths and hundredths?

Grade 4 under the Common Core. Standard 4.NF.5 sits in the same cluster as decimal notation, 4.NF.6, and comparing decimals to hundredths, 4.NF.7. That makes the skill a bridge from fractions to decimals. Other unlike fractions wait for grade 5.

Can you subtract tenths and hundredths the same way?

Yes. Rename the tenths, then subtract the numerators: 57/100 − 3/10 = 57/100 − 30/100 = 27/100. Common Core 4.NF.5 asks only for addition, so Subtract tenths from hundredths is an extra for classes that are ready.

All 13 sheet types

Renaming tenths as hundredths 4

Hundredths back to tenths 70/100 = 7/10. Only hundredths that end in 0 can be written as whole tenths: 70/100 can, 75/100 cannot. Every fraction on this sheet ends in 0, and pupils divide the numerator and the denominator by 10.
Like denominators warm-up, tenths or hundredths 3/10 + 4/10 = 7/10, and 30/100 + 27/100 = 57/100. Both addends already share a denominator, so pupils only add numerators. Use it to check that skill before renaming comes in.
Split hundredths into tenths and hundredths 57/100 = 5/10 + 7/100. Five whole tenths and seven hundredths left over, the same split that place value makes in 0.57. Pupils fill in both numerators.
Tenths as hundredths 3/10 = 30/100. Multiply the numerator and the denominator by 10: each tenth is cut into 10 hundredths. Twenty quick ones, because almost every other sheet on this page opens with this step.

Show all 13 sheet types (9 more)

Adding tenths and hundredths 6

Hundredths + tenths, either order 45/100 + 2/10 = 45/100 + 20/100 = 65/100. The tenths come second in about half of the problems, so pupils have to find the fraction to rename and cannot work by position.
Make one whole 4/10 + 60/100 = 40/100 + 60/100 = 100/100 = 1. Pupils are given the tenths and find the hundredths that finish the whole, or the other way round. The same fact as 40 cents and 60 cents making a dollar.
Missing addend, tenths or hundredths 2/10 + ? makes 65/100. Rename 2/10 as 20/100, then 65/100 − 20/100 = 45/100. The blank is a hundredths fraction in some problems and a tenths fraction in others.
Tenths + single-digit hundredths 3/10 + 4/100 = 30/100 + 4/100 = 34/100. The Common Core's own example for standard 4.NF.5. The hundredths numerator is 1 to 9, so the answer's numerator is the two numerators side by side, a pattern worth letting pupils notice.
Tenths + two-digit hundredths 3/10 + 27/100 = 30/100 + 27/100 = 57/100. Rename the tenths as hundredths, then add the numerators. Sums stay below one whole. A pupil who answers 30/110 has added the denominators too.
Three addends in tenths and hundredths 2/10 + 3/10 + 15/100 = 20/100 + 30/100 + 15/100 = 65/100. Two tenths fractions and one hundredths fraction, or the other way round. Some pupils add the tenths first and rename once, which is fine; the key renames every tenths fraction and then adds.

Past one whole, mixed numbers and subtracting 3

Mixed numbers in tenths and hundredths 1 3/10 + 2 45/100 = 1 30/100 + 2 45/100 = 3 75/100. Rename the tenths, add the wholes, add the hundredths. The fraction parts stay below one whole on this sheet.
Subtract tenths from hundredths 57/100 − 3/10 = 57/100 − 30/100 = 27/100. Common Core 4.NF.5 asks only for addition; this is the same renaming used to take away, for classes that are ready. No answer is below zero.
Sums of one whole or more 7/10 + 45/100 = 70/100 + 45/100 = 115/100 = 1 15/100. The numerators pass 100, so the sum is more than one whole. The key shows 115/100 and the mixed number 1 15/100.

How this list was compiled: Own list of sheet types. Every worked example was checked with exact fraction arithmetic. Standards were read in the full texts in September 2026: Common Core State Standards for Mathematics, https://learning.ccsso.org/wp-content/uploads/2022/11/Math_Standards1.pdf (4.NF.1, 4.NF.2, 4.NF.3a, 4.NF.3c, 4.NF.5 and its footnote, 4.NF.6); Texas Essential Knowledge and Skills, 19 TAC chapter 111, https://tea.texas.gov/laws-and-rules/sboe-rules-tac/sboe-tac-currently-effect/ch111a.pdf (4.2(B), 4.2(E), 4.2(G), 4.3(C), 4.3(E), 4.3(F), 4.3(G), 4.4(A)). Coins were checked against https://en.wikipedia.org/wiki/Dime_%28United_States_coin%29 and https://en.wikipedia.org/wiki/Penny_%28United_States_coin%29, the prefixes deci and centi against https://en.wikipedia.org/wiki/Metric_prefix and decimal fractions against https://en.wikipedia.org/wiki/Fraction. Licence: own work