Georgia 6.NR.1.3

Math6th GradeNumerical Reasoning

The Standard

Perform operations with multi-digit decimal numbers fluently using models and student-selected strategies.

Georgia's K-12 Mathematics Standards · Solve relevant, mathematical problems involving operations with whole numbers, fractions, and decimal numbers.

Teacher's field guide

What Students Need to Do: Students add, subtract, multiply, and divide decimals using methods they choose. They use models, written steps, and estimates to explain and check their calculations.
What Mastery Looks Like: A student selects an efficient method and finds correct sums, differences, products, and quotients. They connect written work to a place-value or area model. They use estimation to catch unreasonable answers.
Common Misconceptions: Students often line up the last digits instead of decimal points when adding or subtracting. They may guess where to place the decimal in a product, or change only the divisor when dividing. Some think 3.5 and 3.50 have different values.
How to Assess It: Exit ticket: A cyclist travels 18.72 miles in 2.4 hours. Find the average miles per hour, show your strategy, and use an estimate to check.

Lesson moves

Use place-value disks on mats to model 14.36 + 2.8 and 14.36 − 2.8, then record each written method.
Ask, “Which method is clearer for 3.75 × 2.4, partial products or the standard algorithm, and why?”
Play Decimal Target: draw digit cards, build two decimals, choose an operation, and score when the result falls within a target range.
Give students a grocery receipt and budget; they total selected prices, find change, and divide the cost equally among three people.

Free download

$Preview of the 6.NR.1.3 printable worksheet$

A ready-to-print activity worksheet aligned to 6.NR.1.3, with an answer key for the teacher on its own page. No account needed.

PDF, US Letter, prints cleanly in black and white.

Keep exploring

Grade, subject, topic, and the complete standard are prefilled. Create one free, no account needed.