"Calculating orally dividing tens, hundreds or hundreds of tens by one digit" Dividing two or three digits by one digit PPT courseware

Description

"Calculating orally dividing tens, hundreds or hundreds of tens by one digit" Dividing two or three digits by one digit PPT courseware

teaching objectives

1. Combined with specific examples, experience the process of independently exploring the method of dividing tens and hundreds by one-digit verbal calculations.

2. Understand the arithmetic of the oral calculation method of dividing numbers of whole tens and whole hundreds by one digit, and be able to use your own method to calculate correctly orally.

3. Gain successful experience in using your own methods to perform oral calculations and communicate mathematical activities.

review review

8×7＝ 4×5＝

80×7＝ 40×5＝

800×7＝ 400×5＝

(1) The hand-made workshop of the toy factory produces 80 teddy bears every day.

Observe the situation diagram and tell me what you found?

80÷4＝20 (pieces)

method one:

The first time, 10 pieces were packed in each box, and the second time, 10 pieces were packed in each box. At this time, 210 pieces were packed in each box, so 80÷4=20.

Method Two:

Think of 80 as 8 tens. 8 tens divided by 4 equals 2 tens, so 80÷4=20.

Method three:

Think about how many times 4 is 80, 4×20=80, that is, 4 20s are 80, so 80÷4=20.

(2) The toy factory’s hand-made workshop produces 240 toy cars every day.

Observe the situation diagram and tell me what you found?

240÷4＝60 (pieces)

Think of 240 as 24 tens. 24 tens divided by 4 equals 6 tens, so 240÷4=60.

1. Oral calculation.

80÷2＝ 420÷6＝

800÷2＝ 420÷7＝

400÷8＝

400÷5＝

2. Put 240 ping pong balls in a paper box.

(1) How many boxes can be packed into every 3 boxes?

240÷3＝80 (box)

Answer: Can hold 80 boxes.

(2) How many boxes can be packed into every 6 boxes?

240÷6＝40 (box)

Answer: Can hold 40 boxes.

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For more information about the PPT courseware "Dividing two or three digits by one digit to calculate to the nearest ten or hundreds or dividing hundreds or tens of digits by one digit" PPT courseware, please click on the PPT courseware "Dividing two or three digits by one digit to calculate to the full ten orally" Or hundreds of tens of numbers divided by a single-digit ppt label.

"Calculating orally dividing tens, hundreds or hundreds of tens by one digit" Dividing two or three digits by one digit Flash animation courseware:

"Calculate orally divide tens, hundreds or hundreds of tens by one digit" Dividing two and three digits by one digit Flash animation courseware This courseware belongs to the fourth unit of the third grade mathematics volume of the Hebei Education Edition on two and three digits Teaching materials for dividing by single digits. Oral calculation to divide numbers into tens, hundreds or hundreds or tens..

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Update Time: 2024-09-09

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

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