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Published byVirgil Hutchinson Modified over 8 years ago

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Rounding Numbers

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Learning Goals LG: Demonstrate the ability to round numbers to the nearest tenth, hundredth, and thousandth Kid friendly: Show that you can round numbers to tenths, hundredths, and thousandths

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Definitions Rounding: Rounding means reducing the digits in a number while trying to keep its value similar. The result is less accurate, but easier to use. Example: 73 rounded to the nearest ten is 70, because 73 is closer to 70 than to 80.

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Number Lines Using a number line can be helpful when rounding. You always want to round to the number closest to the number you are at. When the number is five, you round up

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Practice Number makeover Create a number with three digits after the decimal place by rolling the dice 4 times My number: Let’s round to the nearest thousandth Now to the nearest hundredth Now to the nearest tenth And now to the nearest whole. My number went from to

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Rounding Math Practice Examples 5. a) 88.0 b) 45.23 45.2 c) 24.99 25.0

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Estimation/Comparing Decimals With whole numbers it is easy to see which number is greater than the other. How can you tell right away? – How do you know 23 is less than 132? 0.021 < 0.2 Think of at least three examples by rolling the dice

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Template On the top piece of paper write – Your # Your other # – Ex: On the bottom piece of paper write “How do I know this?”

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In Between Decimals Use the number line sheet you were provided with What are the decimals that fall between… Between 3.2 and 3.6Between 3.2 and 3.3Between 3.2 and 3.21 For decimals between 3.2 and 3.6 you look to the tenths For decimals between 3.2 and 3.3 you look to the hundredths For decimals between 3.2 and 3.21 you look to the thousandths

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