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Florida Grade 4 Math · Fractions

MA.4.FR.2.3: Adding Tenths and Hundredths

What this Grade 4 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.4.FR.2.3?

Students explore adding a fraction with a denominator of 10 to a fraction with a denominator of 100. First they rewrite the tenths as hundredths, then add.

For example, 9100 + 310 = 9100 + 30100 = 39100. Answers do not need to be simplified.

Official benchmarkExplore the addition of a fraction with denominator of 10 to a fraction with denominator of 100 using equivalent fractions.

On the FAST test: part of the Grade 4 reporting category Number Sense and Operations with Fractions and Decimals, which is about 31–37% of the test.

Worked Examples

Worked Example 1

Rewrite, Then Add

410 + 25100
  1. 1Rewrite 410 as hundredths: 40100
  2. 240100 + 25100 = 65100
Answer: 65100

Worked Example 2

A Sum Greater Than One

710 + 45100
  1. 1710 = 70100
  2. 270100 + 45100 = 115100
Answer: 115100

Common Mistakes to Watch For

Adding numerators and denominators

Wrong:410 + 25100 = 29110

Make the denominators the same first: 40100 + 25100 = 65100.

Adding numerators without rewriting the tenths

Wrong:410 + 25100 = 29100

4 tenths is 40 hundredths, not 4 hundredths: 40100 + 25100 = 65100.

Helpful Math Tip

Use money: tenths are dimes and hundredths are pennies. 4 dimes and 25 pennies is 65 cents, or 65100 of a dollar.

Related Grade 4 Skills

MA.4.FR.1.1

Tenths as Hundredths

MA.4.FR.2.2

Adding and Subtracting Fractions

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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.