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Florida Grade 2 Math · Number Sense and Operations

MA.2.NSO.1.2: Hundreds, Tens, and Ones in Different Ways

What this Grade 2 benchmark means, worked examples, common mistakes, and a free printable worksheet.

Created by a Florida mom · Published by Tropical Learning LLC

Download Free Worksheet (PDF)See worked examples

What Is Benchmark MA.2.NSO.1.2?

A three-digit number can be built from hundreds, tens, and ones in more than one way. For example, 241 is 2 hundreds + 4 tens + 1 one, but it is also 24 tens + 1 one, or 241 ones.

Students show these ways with objects (like base-ten blocks), drawings, and equations. Trading 1 hundred for 10 tens, or 1 ten for 10 ones, is the same skill they use later to regroup when adding and subtracting.

Official benchmarkCompose and decompose three-digit numbers in multiple ways using hundreds, tens and ones. Demonstrate each composition or decomposition with objects, drawings and expressions or equations.

How it is tested: Grade 2 students take FAST Star Math, Florida's math test for Kindergarten through Grade 2.

Worked Examples

Worked Example 1

Show 352 Two Ways

Show 352 using hundreds, tens, and ones in two different ways.
  1. 1Standard way: 3 hundreds + 5 tens + 2 ones, which is 300 + 50 + 2.
  2. 2Trade 1 hundred for 10 tens: 2 hundreds + 15 tens + 2 ones.
  3. 3Check: 200 + 150 + 2 = 352
Answer: 3 hundreds + 5 tens + 2 ones, or 2 hundreds + 15 tens + 2 ones

Worked Example 2

Using Only Tens

How many tens are in 470?
  1. 1470 is 4 hundreds and 7 tens.
  2. 2Each hundred is 10 tens, so 4 hundreds is 40 tens.
  3. 340 tens + 7 tens = 47 tens
Answer: 47 tens

Common Mistakes to Watch For

Thinking there is only one way to show a number

Wrong:435 can only be 4 hundreds, 3 tens, 5 ones

Trading 1 hundred for 10 tens gives 3 hundreds, 13 tens, 5 ones. It is still 435.

Using the tens digit as the number of tens

Wrong:360 has 6 tens

The tens digit shows the tens left over after the hundreds. In all, 360 has 36 tens.

Helpful Math Tip

Use real objects: dimes and pennies, or bundles of 10 straws. Ask your child to show the same number two ways, then trade a ten for 10 ones and check that the total stays the same.

Related Grade 2 Skills

MA.2.NSO.1.1

Reading and Writing Numbers to 1,000

MA.2.NSO.2.4

Adding and Subtracting Within 1,000

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Independent Educational Platform. FastChomp is published by Tropical Learning LLC and is not affiliated with, sponsored by, or endorsed by the Florida Department of Education. FAST and Star assessment names are referenced for informational purposes only. FastChomp practice questions are original educational materials, not official Florida FAST assessment questions.