"Ancient Counting" Addition and Subtraction PPT (Lesson 2)

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"Ancient Counting" Addition and Subtraction PPT (Lesson 2)

Part One: Classroom Introduction

1. Master the order and size of numbers 11-20.

2. Preliminarily understand the units and tens places, and experience the counting method with "ten" as the unit.

3. Cultivate the ability to express concepts in mathematical language and experience the fun of learning mathematics.

[Important and difficult points] Master the meanings of the digits and tens of the numbers 11-20.

Ancient Counting PPT, Part 2: Exploration of New Knowledge

Does anyone know what this is? ? ?

Children: Hello! My name is Counter. Starting from my right: the first digit is the ones digit, and the number of beads on it represents several ones; the second digit is the tens digit, and the number of beads on it represents several tens.

read it

Compare, who is bigger? Who is younger?

Summary method

Have you thought about it?

Method of comparing sizes: If the tens digits are the same, the number with a larger single digit is larger.

Ancient Counting PPT, Part 3: Classroom Exercises

I say the numbers and you dial them.

Fill it out

Fill in ○ with “＞”, “＜” or “="

10○12 14○18 20○10

11○17 16○13 15○15

Ancient Counting PPT, Part 4: Class Summary

1. Starting from the right side of the counter, the first digit is the ones digit. If there are several counters, write them in the ones digits. If there are no counters, write 0. The second digit is the tens digit. If there are several tens, write the number in the tens digit. If there is no tens, write the number in the tens digit. If there is no tens, write the number in the tens digit. Omit the tens digit and do not write it.

2. We learned how to compare sizes: if the tens digits are the same, the number with a larger single digit is larger.

Ancient Counting PPT, Part 5: Classwork

Circle it and write it

Do the math

10 + 3 = 6 + 10 =

10 + 0 = 4 + 10 =

10 ＋ 5 ＝ 10 ＋ 10 ＝

Fill it out

(1) 18 is composed of () tens and () ones.

(2) The number composed of 2 tens is ().

(3) The number composed of 6 ones and 1 tens is ().

Keywords: Beijing Normal University edition first grade mathematics PPT courseware free download, ancient counting PPT download, addition and subtraction PPT download, .PPT format;

For more information about the PPT courseware "Addition and Subtraction Counting the Ancients", please click the Addition and Subtraction PPT Counting the Ancients PPT tab.

"Ancient Counting" Addition and Subtraction PPT download:

"Ancient Counting" Addition and Subtraction PPT Download Part One: Situation Introduction In ancient times, in order to record the number of prey, people used stones or knotted ropes to count. Question introduction Knowledge point 1: Recognize the numbers and their components from 11 to 20. Bundle them one by one and recognize them. 10 ones 1 tens ..

"Ancient Counting" Addition and Subtraction PPT (Lesson 1):

"Ancient Counting" Addition and Subtraction PPT (Lesson 1) Part One: Classroom Introduction 1. Understand the symbolic representation of each number from 11 to 20. 2. In specific situational activities, master the order of numbers within 20 and initially establish the concept of number. 3. Cultivate the ability to use mathematical language to...

"Ancient Counting" Addition and Subtraction PPT Courseware 3:

"Ancient Counting" Addition and Subtraction PPT Courseware 3 Counter Children: Hello! My name is Counter. Starting from my right: the first digit is the ones digit, and the number of beads on it represents several ones; the second digit is the tens digit, and the number of beads on it represents several tens. 1..

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Update Time: 2024-06-28

This template belongs to Mathematics courseware Beijing Normal University Edition First Grade Mathematics Volume 1 industry PPT template

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