"Animal World" PPT Courseware 4

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"Animal World" PPT Courseware 4

How to read egg-related data?

0.25 pronounced as: zero point two five

0.365 pronounced as: zero point three sixty five

When reading decimals, the integer part is read as the integer part is read (the integer part is 0 as "zero"), the decimal point is read as "dot", and the decimal part is usually read out in sequence for each digit.

I can write.

1.65 Writing: 1.65

0.06 Writing: 0.06

When writing decimals, the integer part is written in the same way as the integer part (if the integer part is zero, it is written as "0"), the decimal point is written in the lower right corner of the ones place, and the decimal part is written in sequence for each digit.

Numbers like 0.1, 0.25, 0.365... that are used to express tenths, hundredths, thousandths... are called decimals. The counting units of decimals are one-tenth, one-hundredth, one-thousandth... recorded as 0.1, 0.01, 0.001...

Decimals are made up of three parts.

Integer part Decimal point Decimal part

0 . 2 5

0 . 3 6 5

2 1 . 6 5

Write the number on the line below.

1. The heaviest celery weighs 23.8 kilograms.

2. The longest carrot is 3.35 meters long.

3. The longest beet is 5.504 meters long.

4. The circumference of the largest gourd is 1.77 meters.

5. The heaviest pumpkin weighs 0.607 tons

First read out the following decimals, and then talk about the meaning of “4” in each number.

42.05

Reading: forty-two point five

4 is in the tens place, indicating 4 tens

8.43

Read: eight point forty three

4 in the tenth place means 4 0.1

0.24

Pronounced as: zero point two four

4 is on the percentile, meaning 4 0.01

Fierce eyes distinguish right from wrong.

1. The height of the desk is 0.76 meters. ( )

2. Wang Lin’s height is 14.6 meters. ( )

3. The weight of Xiao Ying, a class 1 student in the fourth grade, is about 3.15 thousand ( )

①There are ( ) 0.1 in 0.7; there are 7 0.01 in ( ).

②8 digits ( ) are 0.8; 10 digits 0.1 are ( ).

③0.497 is composed of ( ) 0.1; ( ) 0.01 and ( ) 0.001.

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Update Time: 2024-09-28

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