Grade 6 · The Number System

CCSS.MATH.CONTENT.6.NS.B.3

Fluently add, subtract, multiply, and divide multi-digit decimals using the standard algorithm for each operation.

Read this standard on the official Common Core site

Lessons that teach this standard

• Adding and Subtracting Decimals

  How to add and subtract decimals by lining up the decimal points, why the alignment matters, and how to handle numbers with different lengths.

• Dividing Decimals: Move the Point, Then Divide

  How to divide by a decimal by shifting both numbers until the divisor is whole, why that shift is allowed, and how to divide a decimal by a whole number.

• Multiplying Decimals: Count the Decimal Places

  How to multiply decimals by ignoring the points, multiplying as whole numbers, then counting the decimal places — and why that count is what it is.