Unit R3 · Decimals & Money

💵 Decimals & Money

Five lessons that build decimal fluency from place value all the way to fractions, decimals, and percents — the exact foundation Grade 6 number sense (6.NS.3) depends on. Every lesson uses money contexts to keep the math real and meaningful.

Five Lessons

Unit R3 Lessons

Work through the lessons in order — each one builds on the last.

Lesson 1 · Builds 6.NS.3

💵 Decimal Place Value, Compare & Round

Read decimals using tenths, hundredths, and thousandths; understand that 0.7 = 0.70; compare decimals; and round to any decimal place.

Open Lesson 1 Lesson 2 · Builds 6.NS.3

💵 Add & Subtract Decimals

Line up decimal points to add and subtract decimals and money amounts. Calculate change and solve real-world money problems.

Open Lesson 2 Lesson 3 · Builds 6.NS.3

💵 Multiply Decimals

Multiply decimals by counting decimal places in the factors. Find the cost of multiple items and scale prices up.

Open Lesson 3 Lesson 4 · Builds 6.NS.3

💵 Divide Decimals

Divide decimals to split costs equally, find unit prices, and solve sharing problems. Connects back to long division.

Open Lesson 4 Lesson 5 · Builds 6.NS.3 / 6.RP

💵 Fractions ↔ Decimals ↔ Percents

Convert between fractions, decimals, and percents. Understand that 1/2 = 0.5 = 50% and use all three forms in everyday life.

Open Lesson 5

For the Teacher

Unit R3 Teacher Notes

Prerequisite: Students should be comfortable with whole-number place value and the four operations (Unit R1) before starting Unit R3. Fraction foundations (Unit R2) are helpful for Lesson 5 but not required.

Pacing: Each lesson is designed for a 20–30 minute independent session. All five lessons make a solid one-week unit. Money contexts are used throughout to give every decimal calculation a concrete, familiar meaning.

Standards alignment: All five lessons address 6.NS.3 (fluently add, subtract, multiply, and divide multi-digit decimals using the standard algorithm for each operation). Lesson 5 also previews 6.RP.3c (find a percent of a quantity) and connects to 6.NS.1 fraction work.

Pairs with: the Manipulatives Toolkit for hands-on decimal modeling and the Bilingual Vocab Deck for ESOL support.