Chapter 1: Lesson 2
In Parrot Talk: A Weighty Matter
Lesson 2: Big Mathematical Ideas For This Week
This lesson focuses on estimating, rounding, comparing, and ordering decimals, and exploring the density property of decimals. Students often confuse and misrepresent decimals, relating their place value to skills learned when working with whole numbers. For example, students might perceive 0.3 as a smaller decimal number than 0.23456 because of the number of digits in the number rather than relating it to the place and value of the decimal numbers.
This lesson will investigate the density property of decimals, which states that another decimal value can always be found between any two decimals. For example, decimal values between 0.4 and 0.5 would include decimals such as 0.42 or 0.456. The density property also exists for rational numbers written as fractions, stating that between any two fractions there is an infinite number of fractions. The density property is not shared with integers such as between 4 and 5.
Finally, students will work with metric units expressed as grams and meters as they compare, order, and estimate decimals. Students will also engage in activities for rounding decimal numbers to the nearest whole, tenth, and hundredth places.
VOCABULARY
Lesson 2 Vocabulary
Density property of decimals – between any two decimals on the number line, there is always another decimal. For example, one decimal number between 2.65 and 2.66 is 2.651.
Gram – a metric unit of mass equal to one-thousandth of a kilogram
Mass – a measure of the amount of matter in an object
Meter – the basic unit of length in the metric system
Weight – the measure of the heaviness, or the force of gravity, on an object
Lesson 2 Objectives
- Students will compare and order decimals to the nearest thousandth
- Students will round decimal numbers to the nearest whole, tenth, and hundredth places
- Students will demonstrate an understanding of the Density Property of Decimals
- Students will use number lines to discover decimal numbers hidden within tenths, hundredths, and thousandths
This Week We Will
- Daily Bell Ringer and Skills Practice
- Google Classroom Project
- Lesson 2 Packet
- Timed Multiplication Fluency 2 of 3 (Not Graded)
- Skills Check (Graded)
- Think Deeply (Graded)
Google Classroom Project Due Friday at 10 A.M.
Research ( Google, call, or visit) a minimum of 3 pet rescue and rehabilitation facilities within your local community. Create a presentation that tells the following: name of facility, phone number, website, services they offer. Include pictures in your presentation. Contact one of the facilities on your list and ask what donation items they need to help take care of the animals. Create a list of the items that they accept as donations. You may use Google Slides, Google Docs, and Google Draw. You may also submit your assignment by hand using paper, pencil, posterboard, markers, etc. You will have some class time to work on this assignment, but you may need to work on it at home if you do not have time to complete it at school. We will present some of these projects to the class.