★Expanded Form
Grade 1 Math Worksheet
NameDate
Write the missing part.
29 = 20 +
43 = + 3
67 = 60 +
97 = + 7
35 = 30 +
63 = + 3
72 = 70 +
32 = + 2
94 = 90 +
45 = + 5
77 = 70 +
37 = + 7
PencilGoGrade 1 · Math · Number sense
1st Grade Expanded Form worksheets
6 printable versionsOn LevelAbout 4 minutes eachFree · no account
When it’s done, scan the sheet with your phone and PencilGo marks it and picks the next one. Create a free account
★
Tired of searching for worksheets?
We’ll email one free Grade 1 worksheet every school day. Your child does it on paper. No account needed.
About this worksheet
Expanded form writes a number as the sum of its tens and its ones: 47 is 40 + 7. It shows what each digit is worth, which is why a 4 in the tens place means 40, not 4. On this grade 1 worksheet each line shows a two-digit number and its expanded form with one part missing, such as 47 = 40 + ____ or 47 = ____ + 7, and your child writes the missing part.
Support sheets use numbers from 21 to 59, standard sheets go up to 99, and challenge sheets put the missing part first more often. Say the number as tens and ones out loud first, then write the part that is missing.
What your child will learn
- Write a two-digit number as tens plus ones
- Know a digit's worth depends on its place
- Find the missing tens part or ones part
- Connect 4 tens and 7 ones to 40 + 7
Common Core standard: 1.NBT.B.2
Worked example
47 = 40 + ____. The 4 is in the tens place, so it is worth 40. The 7 is 7 ones. Write 7.
Common mistake
Writing 4 instead of 40 for the tens part.
Helpful hint
The tens digit is worth ten times its face value. 4 tens is 40.
Questions parents ask
What is the most common mistake with expanded form?
Writing 4 instead of 40 for the tens part.
How can I help my child with expanded form?
The tens digit is worth ten times its face value. 4 tens is 40.
Are these 1st grade math worksheets free to print?
Yes. All 6 printable versions on this page are free to download and print, with no account needed.
Similar: Count, Read, and Write to 120 · Tens and Ones
More 1st grade number sense
See all number sense- Number senseCount, Read, and Write to 1206 printable versions
- Number senseTens and Ones6 printable versions
- Next stepCompare Two-Digit Numbers6 printable versions
- Number senseCount Backward6 printable versions
- Number senseNumber Patterns6 printable versions
- Number senseEven and Odd Numbers6 printable versions
- Number senseCount Tens and Ones in Blocks6 printable versions
- Number senseOrder Numbers6 printable versions
- Number senseSkip Count by 2s, 5s, and 10s6 printable versions
- Number senseOrdinal Numbers to Tenth6 printable versions
Every sheet you scan goes into your child’s record: dated, marked and ready for the year-end portfolio. Homeschool records