"Approximate Value of Product" Decimal Multiplication PPT Courseware 3

"Approximate Value of Product" Decimal Multiplication PPT Courseware 3

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"Approximate Value of Product" Decimal Multiplication PPT Courseware 3

Teaching goal: To enable students to use the "rounding method" to intercept the approximate value of a decimal when the product is a decimal.

Key point: The approximation of the quadrature can be correct according to actual needs.

Difficulty: Flexibly use the "rounding method" to obtain approximate values.

Study: Think independently.

1. Oral calculation

0.5×0.6 0.3×0.3

3.5×0.2 0.7×0.11

3.2×3 0.125×8

1-0.48 0.94×1

Old knowledge navigation

The "rounding method" is commonly used to find approximate numbers.

To retain an integer, it depends on whether the first decimal part is 5 or not.

To retain one decimal place, it depends on whether the second decimal place is full of 5.

To retain two decimal places, it depends on whether the third decimal place reaches 5.

Accurate to single digits, that is, keep integers;

Accurate to tenths, that is, retaining one decimal place;

Accurate to the hundredth, that is, retaining two decimal places;

1. Fill in the blanks:

The product of 2.34×0.02 has ( ) decimal places. The accuracy to 0.001 is approximately (), and the rounding to the hundredth is approximately ().

The mantissa after omitting the tenth place of 7.898 is (), remove the third digit after the decimal point, the approximate value is (), and round to an integer is ().

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For more information about the "Approximate Values ​​of Products of Multiplication of Decimals" PPT courseware, please click on the Approximate Values ​​of Products of Multiplication of Decimals ppt tag.

"Approximate Value of Product" Decimal Multiplication PPT Courseware 4:

"Approximate Values ​​of Products" Decimal Multiplication PPT Courseware 4 Teaching Objectives 1. Combined with specific examples, experience the process of independently solving problems and expressing the results with approximate numbers. 2. Further master the calculation method of decimal multiplication; be able to use the rounding method to find the approximate value of the product. 3. Feel...

"Approximate Values ​​of Products" Decimal Multiplication Flash Animation Courseware:

"Approximate Values ​​of Products" Decimal Multiplication Flash Animation Courseware This courseware is a teaching material Flash animation courseware for decimal multiplication in the second unit of the fifth grade mathematics volume of the Hebei Education Edition. The content is vivid and vivid, please download it! Keywords: Teaching courseware for decimal multiplication, teaching approximation of products..

"Approximate Value of Product" Decimal Multiplication PPT Courseware 2:

"Approximate Value of Product" Decimal Multiplication PPT Courseware 2 Teaching Objectives 1. Master the method of finding the approximate value of product, and be able to understand the meaning of the approximate value based on the actual situation. 2. Can use the original experience of finding approximate decimal numbers to actively learn the approximate value of product. 3. Through analysis..

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