Furthering Fifth

     Students will extend previously developed skills with whole numbers and decimals. We will look at estimation strategies, mental methods, pencil-and paper algorithms, and calculator procedures. We will develop techniques for placing the decimal point in answers. 

     We will see how to represent very large and very small numbers with number-and-word notation, exponential notation, and scientific notation. For example scientific notation is one way that mathematicians and scientists express very large and very small numbers. In order to use scientific notation , we will first need to know about exponential notation, which is a way of representing repeated multiplication. For example, 7x7x7x7 can be written at seven to the four power.  

Vocabulary

dividend, divisor, exponent, exponential notation, factor, number-and-word notation, power, power of 10, powers key, precision, quotient, reminder, scientific notation, standard notation

 

Objectives

bullet Translate between scientific notation and standard notation, with and without a calculator
bullet Estimate products and multiply decimals
bullet Divide two whole numbers; give the answer to a specified number of decimal places
bullet Estimate the quotient and divide a decimal by a whole number
bullet Multiply by positive and negative powers of 10
bullet Interpret number-and word notation for large numbers
bullet Use exponential notation for small numbers
bullet Use exponential notation for large numbers
bullet Read, write, and compare numbers form thousandths to trillions
bullet Add and subtract decimals
bullet Estimate quotients and divide whole numbers

 

Games
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Division Dash - One or two players try to reach 100 on a calculator in as few divisions as possible.

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Doggone Decimal - Two players compete to collect the most number cards. This game provides practice in estimating products of whole numbers and decimals.

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Exponent Ball - provides students with practice in exponential notation in the context of a game similar to U.S. football.

 

 

Activities

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Encourage your child to recognize the everyday uses of fractions and decimals in the fields such as science, statistics, business, sports, print and television journalism.

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Encourage your child to incorporate the vocabulary of fractions and decimals into their everyday speech. 

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If you are planning a dinner party or a big meal, have your child help you adjust the amounts of each ingredient needed to be proportionally correct.

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Have your child calculate the tip of a restaurant bill through mental math and estimation. 

 

 

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