One, matting pregnant bend over
1. The mouth answers: (1) 1000 inside have () 100, 10 thousand inside have () 1000.
(2) () 100 be 1000, () 1000 be 10 thousand.
2. Review the digital order of 10 thousand less than.
The teacher shows 5 pieces of card: , 10, 100, 1000, 10 thousand. Teacher above all " 100 " stick on blackboard, designation classmate according to order ordinal stick other card. The fellow student is asked after been stick entirely nuncupative the digital order of 10 thousand less than.
3. Reading practices:
Next what the teacher been stickinging is digital filling number, the student undertakes reading practices. Fine of the occasional in guiding a student to review mainly takes the pronunciation of the number of 0.
4. Want, what is the pronunciation regulation of the number of 10 thousand less than?
(guide the pronunciation that revises number of 10 thousand less than, for from the back the pronunciation that 100 million less than count analogize makes bedding. )
2, dug knows newly
(1) umbriferous show:
Our country Taiwan saved ① to have 20944000 people about 1993.
Speed of satellite of ② man-made world is minutely about 474000 meters.
③ some county plant experimentally paddy is new last year breed, increase production of add up to 5471000 kilogram, appreciation 6705000 yuan.
Student freedom is read above 3 words.
(2) guide language:
We had learned the number of 10 thousand less than, in daily life and production, often still use 10 thousand large number, we learn the pronunciation of larger like these number today.
Task of writing on blackboard: The pronunciation that 100 million less than count
2. Award newly:
(1) education unit of enumeration 100 thousand, 1 million, ten million, 100 million.
① student observes writing on blackboard: , 10, 100, 1000, 10 thousand, want: What law is there between them? Can you continue to be counted downward by such rule?
(guide a student to be on former knowledgeable foundation, undertake migratory, analogize, education gets intellectual ability actively. )
Student basis 10 10 be 100, 10 100 be 1000... number gives him rule: 10 10 thousand be 100 thousand, 10 100 thousand it is million, 10 million are 10 million.
Pedagogic writing on blackboard: 100 thousand, 1 million, ten million.
② knows " 100 million " :
With a moment ago method, we are counted downward then, 10 10 million how much be?
(student acknowledge has difficulty, may speak, 10 10 million be 100 million, be in at this moment, the teacher wants to be counted together with the student, and demonstrate, 100 million namely " 100 million " . )