"Written Calculation of Two Digits Multiplied by One Digit" Multiplying Two and Three Digits by One Digit PPT Courseware

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Hebei Education Edition Third Grade Mathematics Volume 1	pptx	6 MB

"Written Calculation of Two Digits Multiplied by One Digit" Multiplying Two and Three Digits by One Digit PPT Courseware

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Upload Time: 2024-09-09

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Description

"Written Calculation of Two Digits Multiplied by One Digit" Multiplying Two and Three Digits by One Digit PPT Courseware

teaching objectives

1. Combined with specific examples, experience the process of learning the written calculation method of multiplying two digits by one digit.

2. Master the written calculation method of multiplying two digits by one digit, and be able to correctly calculate two digits multiplied by one digit.

3. Feel the connection between mathematics and nature, and cultivate the emotion of caring for nature and benefiting birds.

review review

80×4＝ 30×6＝

20×7＝ 50×8＝

15×3＝ 25×4＝

Nature's angel.

Tell me, what mathematical information can you learn from the picture?

(1) How many pests can a woodpecker eat per day?

18×4=72 (strips)

8×4=32 (strips)

10×4=40 (bars)

32＋40=72(items)

(2) How many pests can a barn swallow eat in one day?

72×8=576 (strips)

Answer: A barn swallow can eat 576 pests in one day.

In conclusion

The written calculation method of multiplying a one-digit number by a two-digit number: align the same digits, multiply from the ones digit, and use the one-digit number to multiply the numbers in each digit of the two-digit number in turn. Multiply the numbers in the ones digit to reach tens, then To add the number to the tens digit, add the number from the ones digit after multiplying the tens digit; if the tens digit is multiplied to tens, write the number directly in the hundreds digit.

practice

1. 26×4＝ 76×6＝

43×7＝ 82×6＝

35×8＝ 65×5＝

48×5＝ 99×9＝

2. Do the math and fill in the blanks.

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For more information about the PPT courseware "Two or three digits multiplied by one digit, written calculation of two digits multiplied by one digit", please click on the "Two or three digits multiplied by one digit ppt written calculation of two digits multiplied by one digit" ppt tag.

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Update Time: 2024-09-09

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"Written Calculation of Two Digits Multiplied by One Digit" Multiplying Two and Three Digits by One Digit PPT Courseware