"Written multiplication of three-digit numbers by two-digit numbers" Multiplication of three-digit numbers by two-digit numbers PPT

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People's Education Press Fourth Grade Mathematics Volume 1	pptx	6 MB

"Written multiplication of three-digit numbers by two-digit numbers" Multiplication of three-digit numbers by two-digit numbers PPT

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Upload Time: 2024-09-08

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"Written multiplication of three-digit numbers by two-digit numbers" Multiplication of three-digit numbers by two-digit numbers PPT

Part One: Exciting Introduction

Vertical calculation:

144×5= 44×15=

Three-digit multiplication of two-digit numbers PPT, part 2: knowledge explanation

It takes 12 hours to take the train from Beijing to Shanghai. The train travels 145 kilometers per hour. How many kilometers is it from Beijing to Shanghai?

Students, what is known in the question? What is required?

In the question, it is known that the train travels 145 kilometers in one hour and it travels for 12 hours. How many kilometers is it required to travel in 12 hours?

Calculation: 145 × 12≈1500

150×10=1500

It is estimated to be about 1500 kilometers.

Three-digit multiplication by two-digit PPT, the third part: practice and consolidation

After the Dragon Boat Festival, the company will send Uncle Li to Guangzhou on a business trip. It takes about 29 hours for Uncle Li to travel from Harbin to Guangzhou by train. The train travels an average of 145 kilometers per hour. How many kilometers did Uncle Li travel by train?

145×29=4205 (km)

Answer: Uncle Li traveled 4205 kilometers by train.

Three-digit multiplication by two-digit PPT, Part 4: Knowledge summary

1. First use the number in the ones digit of the two-digit number to multiply each digit of the three-digit number so that the last digit of the number is aligned with the ones digit.

2. Then use the two-digit number in the tens digit to multiply each three-digit number until the last digit of the number is aligned with the tens digit.

3. Finally, add up the products of the two multiplications.

Keywords: Free download of PPT courseware for fourth-grade mathematics from the People's Education Press, PPT download of written multiplication of three-digit numbers by two-digit numbers, PPT download of three-digit multiplication of two-digit numbers, .PPT format;

For more information about the PPT courseware "Three digits times two digits, three digits times two digits, written calculation multiplication", please click on the Three digit times two digits PPT, three digits times two digits, written calculation multiplication PPT tag.

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Update Time: 2024-09-08

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Three digits multiplied by two digits PPT Three digits multiplied by two digits PPT

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"Written multiplication of three-digit numbers by two-digit numbers" Multiplication of three-digit numbers by two-digit numbers PPT