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Florida Grade 2 Math · Number Sense and Operations

MA.2.NSO.2.4: Adding and Subtracting Within 1,000

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.2.4?

Grade 2 students explore adding and subtracting with numbers up to 1,000. This is an exploration benchmark: the focus is on understanding, using base-ten blocks, number lines, drawings, and place value.

Students compose and decompose hundreds, tens, and ones as needed. For example, 10 tens can be traded for 1 hundred, and 1 hundred can be broken into 10 tens.

Official benchmarkExplore the addition of two whole numbers with sums up to 1,000. Explore the subtraction of a whole number from a whole number, each no larger than 1,000.

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

Add Hundreds, Tens, and Ones

256 + 371
  1. 1Hundreds: 200 + 300 = 500
  2. 2Tens: 50 + 70 = 120
  3. 3Ones: 6 + 1 = 7
  4. 4Put them together: 500 + 120 + 7 = 627
Answer: 627

Worked Example 2

Subtract Using a Friendly Number

503 − 8
  1. 1Break 8 into 3 and 5.
  2. 2503 − 3 = 500
  3. 3500 − 5 = 495
Answer: 495

Common Mistakes to Watch For

Not trading 10 tens for 1 hundred

Wrong:256 + 371 = 5127

5 tens + 7 tens = 12 tens, which is 1 hundred and 2 tens. 256 + 371 = 627.

Subtracting the smaller digit from the larger one in each place

Wrong:402 − 135 = 333

Regroup: 402 is 3 hundreds, 9 tens, and 12 ones. 12 − 5 = 7 ones, 9 − 3 = 6 tens, 3 − 1 = 2 hundreds. 402 − 135 = 267.

Helpful Math Tip

Use a number line for subtraction near a hundred. For 1,000 − 17, jump back 10 to 990 and then 7 more to 983.

Related Grade 2 Skills

MA.2.NSO.2.3

Adding and Subtracting Within 100

MA.2.NSO.1.2

Hundreds, Tens, and Ones in Different Ways

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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.