Identify Standard and Expanded Forms of 2-Digit Numbers
Write two digit numbers in standard and expanded form.
1st Grade - Math - Understand Place Value
About This Skill
On Iqleel, first-grade students will learn to write 2-Digit Numbers in two different ways. They will practice writing a number in standard form (like 72) and then breaking it apart to show the value of the tens and ones in expanded form (like 70 + 2). This skill is key to deeply understanding place value and how numbers are built.
Key Idea
In Brief Let's learn how to read, write, and break apart 2-digit numbers using standard form and expanded form. A 2-digit number is made of: Tens + Ones You can compose or decompose the number to see its value! Imagine you have 4 boxes of 10 crayons and 3 single crayons. That makes 43 crayons! You can say it the short way 43 or the long way 40 + 3. Both are right! Key Points Standard Form shows the normal way we write a number using digits. Example: 43 Expanded Form shows the value of each digit by adding the value of the tens and the value of the ones. Example: 40 + 3 How To Let’s look at this picture: 2. Count the tens. There are 6 tens → that’s 60 3. Count the ones. There are 4 ones → that’s 4 4. Compose the numbers: 60 + 4 = 64 5. Write It in both ways: ● Standard Form: 64 ● Expanded Form: 60 + 4
Skills & Topics
- Number Sense and Operations
- Whole Numbers
- Place Value
- Quantities
- Addition
- Digit
- Counting Numbers
- Base-Ten Numerals
- Cardinality
- Number Sense
- Quantity
- Tense
- 2-Digit Numbers
- Equation
- Expanded Form
- Plus Sign
- Standard Form
Curriculum Alignment
- 1.NBT.B.2: Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases: a. 10 can be thought of as a bundle of ten ones — called a “ten.” b. The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones. c. The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).
- AC9M1N02: partition one- and two-digit numbers in different ways using physical and virtual materials, including partitioning two-digit numbers into tens and ones
- NY-1.NBT.2
- 1.NBT.B.2
- MA.1.NSO.1.2
- MATH.1.2.C
- ZA.CAPS.MATH.G1.NOR.1.5
- ENG-MATH-Y1-NPV.4: Identify and represent numbers using objects and pictorial representations including the number line, and use the language of: equal to, more than, less than (fewer), most, least.
- SG.MATH.P1.NA.WN.1.2