Decimals: Tenths, Hundredths, and Beyond
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Decimals: Tenths, Hundredths, and Beyond
Understanding decimal numbers and place value Years 3-5 Mathematics New Zealand Curriculum
What Are Decimals?
Numbers that show parts smaller than 1 Use a decimal point (.) to separate whole numbers from parts Help us measure things more precisely Connect to fractions we already know
Number Line Adventure
Let's place decimals on a number line! Start with 0 and end with 1 Find 0.1, 0.5, and 0.9 Work with a partner to mark your number line
Understanding Place Value
Ones place - whole numbers (1, 2, 3...) Decimal point separates wholes from parts Tenths place - first digit after decimal point Hundredths place - second digit after decimal point
Decimals in Money
{"left":"$1.00 = 100 cents\n$0.50 = 50 cents\n$0.10 = 10 cents\n$0.01 = 1 cent","right":"70 cents = $0.70\n25 cents = $0.25\n5 cents = $0.05\n99 cents = $0.99"}
Measuring with Decimals
Use rulers to measure classroom objects Record measurements in centimeters Look for tenths: 1.3 cm, 2.7 cm Share your findings with the class
Quick Check: Can You Read These Decimals?
0.3 0.75 0.08 0.4 Which is larger: 0.6 or 0.9?
What We've Learned Today
Decimals show parts smaller than whole numbers The decimal point separates wholes from parts Tenths and hundredths are the first two decimal places We use decimals every day with money and measurements Next lesson: Adding and subtracting decimals!