Lesson: Round Decimal Numbers
Lesson Objective
Lesson Plan
Standard 

6NSO.N7 – Round whole numbers and decimals to any given place 

Aim/Objective: 
Key Points 
SWBAT round decimal numbers to any given place 
· To round a number means to determine which benchmark it is the closest to · Rounded numbers end in zeros, however we don’t always have to write the zeros with decimals 
Assessment: 

Exit Ticket 1. Round to the underlined digit: 438.845 2. Round the following number to the nearest hundredth: 589.289 3. Round the following number to the nearest dollar: $58.76 4. Round to the nearest whole number: 384,494.57 5. Round to the nearest hundred: 743,982.491


Lesson 

Do Now: Review Rounding Practice from previous day:  Round 489,548 to nearest tenth  Round 5,389,438 to nearest thousand  Round 63,289,491 to nearest ten million Materials:
Opening: Reveal the decimal side of the place value chart and review place value names with quick questioning game (cold call): · Which digit is in the_____ place? · What place is the ___ in? · What is the value of the _____? · Clarify the place value names – no “oneths” place Intro/Direct Instruction: · Review aim with students – our goal by the end of class is to be able to round any number to any place asked · Yesterday, we had a chant and a demonstration to help us remember the rule for rounding · Remember that when we are rounding a number we are saying which benchmark is this number closer to – so if we are rounding to the nearest tenth, we are thinking which tenth is this number closest to · One way to think of this is to think of a number line – on number lines it can sometimes be easier to see which benchmark a number is closest to · During model of rounding numbers – show a number line to show visual how to determine which number it is closest to – continue to use the same way of showing the work during the model: underline digit in the place you are rounding to, circle the digit to the right – if the digit in the circle is 0 – 4, keep the underlined digit the same; if the digit in the circle is 59, add one to the underlined digit. o Example 1: Regular rounding with decimals o Example 2: Round over a 9 o Example 3: Round to the nearest “dollar” o Example 4: Round to the nearest “whole number” · Within examples, highlight that 58.8 and 58.80 have the same value and that either is an acceptable answer when rounding Guided Practice · S will complete sample problems rounding decimal numbers o Example 1: Regular rounding with decimals o Example 2: Round over a 9 o Example 3: Round to the nearest “dollar” o Example 4: Round to the nearest “whole number” Independent Practice · S will complete worksheet on rounding decimal numbers · Teacher and S will review answers after independent practice · S will complete exit ticket Closing · Review key points with students · If you are asked to round to the nearest dollar which place value are you rounding to? · True or false: 569.543 rounded to the nearest tenth is 569.5 · Is there another way to write the answer for that question? 

Accommodations 

Fewer problems, place value chart provided for students 

Skills Time 

1. Pretest Computation Skills/Facts Practice 
Lesson Resources
CW RoundingDecimalsNumbers Unit1 Classwork 
3,244

HW RoundingDecimalNumbers Unit1 Homework 
1,421

Notes 4 Rounding Decimals 
2,077

Comments