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Florida Grade 2 Math · Number Sense and Operations

MA.2.NSO.2.2: 10 More, 10 Less, 100 More, 100 Less

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.2.2?

Students find the number that is 10 more, 10 less, 100 more, or 100 less than a three-digit number, using place value instead of counting one by one.

Adding or taking away 10 changes the tens digit. Adding or taking away 100 changes the hundreds digit. The other digits stay the same, except when the tens go past 9 or below 0.

Official benchmarkIdentify the number that is ten more, ten less, one hundred more and one hundred less than a given three-digit number.

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

10 More and 10 Less

What is 10 more than 457? What is 10 less?
  1. 1The tens digit is 5.
  2. 210 more: the tens digit goes up by 1, so 457 becomes 467.
  3. 310 less: the tens digit goes down by 1, so 457 becomes 447.
Answer: 10 more is 467; 10 less is 447

Worked Example 2

100 More and 100 Less

What is 100 more than 236? What is 100 less?
  1. 1The hundreds digit is 2.
  2. 2100 more: the hundreds digit goes up by 1, so 236 becomes 336.
  3. 3100 less: the hundreds digit goes down by 1, so 236 becomes 136.
Answer: 100 more is 336; 100 less is 136

Common Mistakes to Watch For

Changing the ones digit

Wrong:10 more than 352 is 353

10 more changes the tens digit, not the ones: 10 more than 352 is 362.

Forgetting to regroup when the tens digit is 9

Wrong:10 more than 495 is 405

9 tens + 1 ten = 10 tens, which is 1 more hundred. 10 more than 495 is 505.

Helpful Math Tip

Count by tens or hundreds from any number, not just from zero: 238, 248, 258, ... or 238, 338, 438, ... Ask your child which digit is changing and why.

Related Grade 2 Skills

MA.2.NSO.1.2

Hundreds, Tens, and Ones in Different Ways

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.