| Category | Format | Size |
|---|---|---|
| Hebei Education Edition Third Grade Mathematics Volume 1 | pptx | 6 MB |
"Dividing two-digit numbers by one-digit numbers orally" Dividing two- and three-digit numbers by one-digit numbers PPT courseware
Description
"Dividing two-digit numbers by one-digit numbers orally" Dividing two- and three-digit numbers by one-digit numbers PPT courseware
teaching objectives
1. Combined with specific examples, experience the process of independently exploring the simple oral calculation method of dividing two-digit numbers by one-digit numbers.
2. Able to calculate correctly orally dividing a simple two-digit number by a one-digit number.
3. Actively participate in mathematics activities and have fun learning.
review review
630÷7＝270÷9＝
120÷3＝50÷5＝
60÷2＝ 400÷5＝
Before the National Day, the school bought 84 pots of flowers to decorate the campus and planned to arrange them into four identical small flower beds.
84÷4＝21(pot)
method one:
If you multiply 4, you get 84. 4×21=84, which means there are 4 21s in 84, so 84÷4=21.
Method Two:
Divide 84 into 80 and 4, divide 80 and 4 by 4 respectively, and finally add up the quotients of the two times.
80÷4＝20(pot)
4÷4＝1 (pot)
20+1=21 (pot)
practice
1. Oral calculation.
26÷2＝39÷3＝
68÷2＝ 48÷4＝
96÷3＝
66÷6＝
2. There are 36 students participating in the rope skipping competition, each group of 3 people. How many skipping ropes do I need to prepare?
36÷3＝12(root)
Answer: You need to prepare 12 skipping ropes.
3. The school purchased 66 computers and allocated them to 2 electronic reading rooms. How many computers are installed in each reading room on average?
66÷2＝33 (Taiwan)
Answer: On average, there are 33 computers installed in each reading room.
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File Info
Update Time: 2024-07-04
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