"Approximate Numbers of Decimals" Decimal PPT Courseware 2

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"Approximate Numbers of Decimals" Decimal PPT Courseware 2

What is the approximate number of 2.953 to two decimal places?

2.953≈2.95

To retain two decimal places, the mantissa after the hundredth place must be omitted, and the thousandth place determines the rounding.

Think about it:

0.984≈____(retain integer)

When finding approximate numbers:

Keep integers, indicating accuracy to single digits;

With one decimal place, the accuracy is to the tenth place; with two decimal places, the accuracy is with the hundredth place...

Find the approximate number of the following decimals.

(1) 0.256 12.006 (round to two decimal places)

(2) 7.816 13.974 (round to one decimal place)

(3) 1.234 25.519 (retain integers)

Discuss:

(1) 2.953 with one decimal place is 3.0. Can the 0 at the end of the decimal be removed? Why?

(2) Comparing the approximate numbers 3.0 and 3, which one is more accurate and why?

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For more information about the PPT courseware "Approximate Numbers of Decimals and Decimals", please click the Decimals ppt Approximate Numbers of Decimals ppt tag.

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"Approximate Numbers of Decimals" Decimal PPT Courseware 3:

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Update Time: 2024-10-02

This template belongs to Mathematics courseware Western Normal University Edition Fourth Grade Mathematics Volume 2 industry PPT template

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