ALEX Classroom Resource

  

Rounding to the Nearest Ten or Hundred

  Classroom Resource Information  

Title:

Rounding to the Nearest Ten or Hundred

URL:

https://gpb.pbslearningmedia.org/resource/44f04c90-ce1a-4def-94fa-78102893528c/rounding-nearest-10-or-100/

Content Source:

PBS
Type: Audio/Video

Overview:

Learning to assess the reasonableness of an answer is an important mathematical skill. It’s students' way of seeing if they are on the right track when problem-solving. Sometimes we use rounding to estimate a solution.

Content Standard(s):
Mathematics
MA2019 (2019)
Grade: 3
10. Identify the nearest 10 or 100 when rounding whole numbers, using place value understanding.

Unpacked Content
Evidence Of Student Attainment:
Students:
When given two-digit or three-digit number to round to the nearest 10 or 100,
  • Identify the ten or hundreds that the number falls between.
  • Plot the number on a number line between the tens or hundreds.
  • Identify the nearest ten or hundred and justify the answer.
  • Identify a possible value of the unknown number when instructed that an unknown number will round to a given number when rounding to the nearest 10 or 100.

  • Example: An unknown number will round to 340 when rounded to the nearest 10. Identify a possible value for the unknown number.
Teacher Vocabulary:
  • Place value
  • Round
  • Nearest 10
  • Nearest 100
  • Benchmark number
  • Midpoint
Knowledge:
Students know:
  • Values of the digits in the ones, tens, and hundreds places.
  • How to determine what is halfway between two multiples of 10 or 100.
  • Strategies for rounding to the nearest 10 or 100.
  • Use place value vocabulary and logical reasoning to justify solutions when rounding.
Skills:
Students are able to:
  • Round whole numbers to the nearest 10 or 100.
  • Identify a possible value for a number which will result in a given number rounded to the nearest 10 or 100.
    Example: What value will result in 270 when rounded to the nearest 10? Identify the possible values.
Understanding:
Students understand that:
  • rounding is determining which ten or hundred a number is closer to.
Diverse Learning Needs:
Essential Skills:
Learning Objectives:
M.3.10.1: Define rounding.
M.3.10.2: Round whole numbers from 100 to 999 using whole numbers from 10 to 99.
M.3.10.3: Model rounding whole numbers to the nearest 100.
M.3.10.4: Round whole numbers from 10 to 99 using whole numbers from 1 to 9.
M.3.10.5: Model rounding whole numbers to the nearest 10.
M.3.10.6: Identify the steps in rounding two- and three-digit numbers.
Example: Identify the digit that may change and the number to the right.
M.3.10.7: Round whole numbers from 1 to 9 and model to show proficiency.
M.3.10.8: Understand that the two digits of a two-digit number represent amounts of tens and ones.
M.3.10.9: Match the number in the ones, tens, and hundreds position to a pictorial representation or manipulative of the value.

Prior Knowledge Skills:
  • Determine the value of the number in the ones, tens and hundreds place.
  • Recognize the place value of ones, tens and hundreds.

Alabama Alternate Achievement Standards
AAS Standard:
M.AAS.3.10 Using vocalization, sign language, augmentative communication, or assistive technology use concrete materials and pictorial models to model whole numbers.


Tags: place value, rounding
License Type: Custom Permission Type
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https://creativecommons.org/licenses
Partnered Event: ALEX Resource Development Summit
Accessibility
Comments

2019 ALCOS

10. Identify the nearest 10 or 100 when rounding whole numbers, using place value understanding.

  This resource provided by:  
Author: Michelle Frye
The event this resource created for:ALEX Resource Development Summit