"Estimation of multiplying whole tens and whole hundreds by one digit and two or three digits by one digit" Multiplying two or three digits by one digit PPT courseware

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Jiangsu Education Edition Third Grade Mathematics Volume 1	pptx	6 MB

"Estimation of multiplying whole tens and whole hundreds by one digit and two or three digits by one digit" Multiplying two or three digits by one digit PPT courseware

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Upload Time: 2024-11-17

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Description

"Estimation of multiplying whole tens and whole hundreds by one digit and two or three digits by one digit" Multiplying two or three digits by one digit PPT courseware

What information did you get?

There are 20 eggs in each box. How many eggs are there in 3 boxes?

How to list it?

Addition formula: 20+20+20=60 (number)

Multiplication formula: 20×3=60

Can anyone tell me what this multiplication equation means?

There are 20 eggs in each box, a total of 3 boxes, that is, 3 20s. Find the sum of the 3 20s as a multiplication formula: 20×3

How to calculate it?

Think: What is 20 3’s? 20 eggs per box is 2 tens, 3 boxes in total: 2 tens times 3 is 6 tens, which is 60, so 20×3=60

Summary: Multiply an integer by a single digit. When calculating, we treat the integer as several tens, and then multiply by a single digit. That is, you can first multiply the highest digit of the integer by a single digit. . Then if you see that there is a 0 at the end of the integer, add a 0 after the multiplied product. (It can also be said: to calculate tens times a number, first multiply the number by a number, and then add a 0 after the number.)

What information did you get?

There are 300 pine cones in each basket. How many pine cones are there in 4 baskets?

How to list it?

300×4=1200 (pieces)

How to calculate it?

Think: 300 is 3 hundreds, 3 hundreds multiplied by 4 is 12 hundreds, 12 hundreds is 1200, so 300×4=1200.

Give it a try and you will make new discoveries.

2×3= 3×5= 5×4=

20×3= 3×5 0= 50×4=

200×3= 3×5 00= 500×4=

Compare to see who can count faster

10×4= 10×6= 8×10=

20×4= 20×6= 8×20=

300×4= 300×6= 8×300=

Keywords: courseware for multiplying two or three digits by one digit, estimating courseware for multiplying tens and whole hundreds by one digit and two or three digits by one digit, Jiangsu Education Edition third grade mathematics PPT courseware download, third grade mathematics slideshow Download PPT courseware for multiplying two or three digits by one digit, download PPT courseware for estimating multiplied by one digit of a whole ten or a hundred and multiplication of a two or three digit number by one digit, in .PPT format;

For more information about the PPT courseware "Estimation of whole tens and whole hundreds multiplied by one digit and two or three digits multiplied by one digit", please click on the sum of whole tens and whole hundreds multiplied by one digit Estimation of two or three digits multiplied by one digit ppt Two or three digits multiplied by one digit ppt label.

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Update Time: 2024-11-17

This template belongs to Mathematics courseware Jiangsu Education Edition Third Grade Mathematics Volume 1 industry PPT template

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