### Examples

*Example:*The number four hundred thirteen written in standard form is 413 and in expanded form is 400+10+3.

*Example:* The number seven hundred nine written in standard form is 709 and in expanded form is 700+9.

**Subject Area:**Mathematics (B.E.S.T.)

**Grade:**2

**Strand:**Number Sense and Operations

**Date Adopted or Revised:**08/20

**Status:**State Board Approved

## Benchmark Instructional Guide

### Connecting Benchmarks/Horizontal Alignment

### Terms from the K-12 Glossary

- Expression

### Vertical Alignment

Previous Benchmarks

Next Benchmarks

### Purpose and Instructional Strategies

The purpose of this benchmark is to extend the understanding of place value from grade 1 to include reading and writing numbers up to 1,000 in various forms. The value of a digit is impacted by its position in a number (MTR.5.1).- Instruction includes the understanding that in expanded form each digit of a multi-digit number is assigned a value based on its place.
- Instruction includes experiences with numbers written in different forms.
- Instruction includes the use of both proportional and non-proportional models (i.e., base ten models or place value disks) (MTR.5.1).

### Common Misconceptions or Errors

- Students may identify digits instead of naming their value.
- For example, students may say the value of the 4 in the number 142 is just 4, as in
4
*ones*.

- For example, students may say the value of the 4 in the number 142 is just 4, as in
4
- Students may misinterpret the value of the ones, tens or hundreds digit as the number of
*ones*, tens or hundreds.- For example, students may say that there are 40
*tens*in the number 142.

- For example, students may say that there are 40
- Students may have difficulty expressing numbers with zero tens.
- Students may incorrectly record the standard form based on word form.

### Strategies to Support Tiered Instruction

- Instruction includes the use of base-ten blocks and a place value chart. The teacher asks students to build the number using base-ten blocks on a place value chart. Then, asks them to write the number (standard form). If they write 25, teacher asks about how many of each place value and rewrites the number while discussing the value of the hundreds, tens and ones.
- Instruction includes using base-ten blocks and a place value chart to represent a 3-digit number (e.g., 365 can be represented by 3 flats, 6 rods, 5 units).
- For example, teacher asks students to label the place value using the expanded form under the rods on the chart. (300 under the flats, 60 under the rods, 5 under the units). The teacher has students write out the word form using the expanded form to assist in writing it out. Finally, teacher asks students what the number would be in all forms if we removed 60?

### Instructional Tasks

*Instructional Task 1* (MTR.2.1)

### Instructional Items

*Instructional Item 1 *

a. 600+3b. 600 + 13c. 600+10+3d. 500+90+33

**The strategies, tasks and items included in the B1G-M are examples and should not be considered comprehensive.*

## Related Courses

## Related Access Points

## Related Resources

## Formative Assessments

## Lesson Plans

## Original Student Tutorials

## MFAS Formative Assessments

Students are asked to count by ones, starting at various numbers, within 1000.

Students are presented with six numerals and are asked to read the numbers.

Students are shown three numbers in expanded form and asked to write the corresponding numeral.

Students write the expanded form of a number from hearing the word name of a number.

## Original Student Tutorials Mathematics - Grades K-5

Learn to read and write numbers to 1000 using base-ten numerals with the dolphins!

This interactive tutorial is part 1 of a two-part series. Click **HERE** to open Part 2.

Learn read and write numbers in expanded form with the dolphins in this interactive tutorial.

This is Part 2 in a two-part series. Click **HERE **to open Part 1.

## Student Resources

## Original Student Tutorials

Learn read and write numbers in expanded form with the dolphins in this interactive tutorial.

This is Part 2 in a two-part series. Click **HERE **to open Part 1.

Type: Original Student Tutorial

Learn to read and write numbers to 1000 using base-ten numerals with the dolphins!

This interactive tutorial is part 1 of a two-part series. Click **HERE** to open Part 2.

Type: Original Student Tutorial