"Saving Pocket Money" Understanding Decimals PPT

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"Saving Pocket Money" Understanding Decimals PPT

Part One: Introduction to Situation

1. Fill it out.

(1)5.9 Yuan = (　 ) Yuan (　 ) Jiao = ( ) Jiao

(2) 3 yuan, 3 jiao and 2 cents = ( ) yuan

2. Do the math.

124-23= 103+28=

PPT on saving pocket money, part 2: knowledge explanation

11.5+3.2=14.7 (yuan)

11 yuan + 3 yuan = 14 yuan

5 cents + 2 cents = 7 cents

That is 14.7 yuan.

Naughty wants to buy a 29.9 yuan schoolbag for children in disaster areas. How many more yuan does he need to save?

29.9-14.7=15.2 (yuan)

Calculate according to the rules of integer subtraction, counting from the last digit, and finally put the decimal point in the resulting number so that it is aligned with the decimal point on the horizontal line.

Let’s talk about why decimal points should be aligned.

Aligning the decimal points means aligning the same digits to add or subtract.

PPT on saving pocket money, part three: practice and consolidation

1. (1) How much did Lele spend to buy these two toys?

(2) How much cheaper is a toy bear than a toy car?

(1) 15.4 + 4.2 = 19.6 (yuan)

Answer: Lele spent a total of 19.6 yuan on these two toys.

(2) 15.4-4.2=11.2 (yuan)

Answer: The toy bear is 11.2 yuan cheaper than the toy car.

2. Continue the calculation.

3. Judgment, please correct it if it is incorrect.

PPT on saving pocket money, part 4: knowledge summary

Vertical calculation method for decimal addition and subtraction:

To add and subtract two decimals, first align the decimal points (that is, align the numbers in the same digit);

Then calculate according to the rules of integer addition;

Finally, place the decimal point in the resulting number so that it aligns with the decimal point on the horizontal line.

Keywords: Beijing Normal University edition third-grade mathematics PPT courseware download for free, save pocket money PPT download, understand decimals PPT download, .PPT format;

For more information about the PPT courseware "Understanding Decimals and Saving Pocket Money", please click the "Understanding Decimals PPT and Saving Pocket Money" PPT tab.

"Saving Pocket Money" Understanding Decimals PPT Courseware:

"Saving Pocket Money" Understanding Decimals PPT Courseware How much pocket money did Naughty save in two months? 11.5 + 3.2 = 14.7 (yuan) Naughty wants to buy a schoolbag worth 29.9 yuan to give to children in the disaster area. How many more yuan does he need to save? 29.9-14.7＝15.2 (yuan) .....

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Update Time: 2024-10-18

This template belongs to Mathematics courseware Beijing Normal University Edition Third Grade Mathematics Volume 1 industry PPT template

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