"Simple Addition and Subtraction Calculations" PPT

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"Simple Addition and Subtraction Calculations" PPT

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"Simple Addition and Subtraction Calculations" PPT

Part One: Knowledge Review

fill in the blank.

80 cents and 6 cents = ( ) yuan

2.5 yuan = 2( )5( )

0.49 yuan = 4( )9( )

Example 1 Buying toiletries.

(1) How much does it cost to buy a toothbrush and toothpaste?

4.2+6.5=10.7 (yuan)

First add the dollars and angles separately...

4 yuan + 6 yuan = 10 yuan

2 cents + 5 cents = 7 cents

10 yuan + 7 cents = 10 yuan and 7 cents

10 yuan and 7 jiao = 10.7 yuan

Can be calculated vertically.

Simple addition and subtraction calculation PPT, part 2: practice.

(1) How much does it cost to buy a towel and a piece of soap?

8.4+3.4=11.8 (yuan)

(2) How much more does a bottle of shampoo cost than a towel?

12.5-8.4=4.1 (yuan)

(3) Ask and solve mathematical problems yourself.

Simple addition and subtraction calculation PPT, the third part: summary:

To calculate the addition and subtraction of decimals, first align the decimal points of each number (that is, align the decimals on the same digit), then perform the calculation according to the rules of addition and subtraction of integers, and finally align the decimal points on the horizontal line in the resulting number, and dot decimal point.

Note: Count from low position.

Keywords: Free download of Hebei Education Edition mathematics PPT courseware for third grade volume 2, simple addition and subtraction calculation PPT download, .PPT format;

For more information about the PPT courseware "Preliminary Understanding of Decimals and Simple Addition and Subtraction Calculation", please click on the "Preliminary Understanding of Decimals ppt Simple Addition and Subtraction Calculation" ppt tag.

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Update Time: 2024-10-02

This template belongs to Mathematics courseware Hebei Education Edition Third Grade Mathematics Volume 2 industry PPT template

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