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Basic division

Introduction to division as sharing and grouping

Primary 2Unit: 2N6

🎯 Learning Objectives 學習目標

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    Recognise the basic concept of division.

    (認識除法的基本概念)

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    Perform basic division (with possible remainders).

    (進行基本除法運算,可能有餘數)

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    Recognise the relation between multiplication and division.

    (認識乘法與除法的關係)

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    Solve problems.

    (解決問題)

📋 Progress 進度

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Division Concept

Understand division as sharing

Division as Grouping

Understand division as grouping

Division Calculation

Perform basic division calculations

Division & Multiplication

Understand the relationship

Division Problems

Solve real-world division problems

🧮 Introduction to Division 除法簡介

Division is a way to split a number into equal groups.除法是將一個數分成相等的組的方法。

12 ÷ 3 = 4

Twelve divided by three equals four

十二除以三等於四

Division as Sharing 除法作為分享

When we divide by sharing, we distribute items equally among groups.當我們通過分享來除法時,我們平均分配物品到各組。

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Division as Grouping 除法作為分組

When we divide by grouping, we make groups with a specific number of items.當我們通過分組來除法時,我們創建具有特定數量物品的組。

Box 1
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Box 2
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Box 3
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🍎 Division as Sharing 除法作為分享

Let's practice dividing by sharing items equally among groups.讓我們練習通過在各組之間平均分配物品來進行除法。

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If we have 12 apples and want to share them equally among 3 friends, how many apples does each friend get?

如果我們有 12 個蘋果, 想平均分給 3 個朋友, 每個朋友能得到多少個蘋果?

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Friend 1
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Friend 2
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Friend 3
Apples:
12
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Division Sign
Friends:
3

🧸 Division as Grouping 除法作為分組

Let's practice dividing by making groups with a fixed number of items.讓我們練習通過創建具有固定數量物品的組來進行除法。

If we have 15 teddy bears and want to put 4 teddy bears in each box, how many boxes do we need?

如果我們有 15 隻泰迪熊, 要在每個盒子裡放 4 隻泰迪熊, 我們需要多少個盒子?

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15 Bears
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4 Bears Per Box
Number of boxes 盒子數量:
Leftover bears 剩餘的熊:

🔢 Division Calculations 除法計算

Let's solve some division problems and find the quotients and remainders.讓我們解決一些除法問題,找出商和餘數。

Problem 1 of 5
8 ÷ 2 = ?
Sharing 8 items among 2 groups
Quotient 商:
Remainder 餘數:

🔄 Multiplication and Division 乘法和除法

Multiplication and division are related! When we know a division fact, we also know a multiplication fact.乘法和除法是相關的!當我們知道一個除法事實時,我們也知道一個乘法事實。

Division 除法

12 ÷ 4 = 3

If we have 12 items and put them into 4 equal groups, we get 3 items in each group.如果我們有12個物品並將它們分成4組,每組有3個物品。

Multiplication 乘法

4 × 3 = 12

If we have 4 groups with 3 items in each group, we have 12 items in total.如果我們有4組,每組3個物品,總共有12個物品。

Fact Family 事實族

12 ÷ 4 = 3
12 ÷ 3 = 4
4 × 3 = 12
3 × 4 = 12

Match the Division with its Multiplication Pair!將除法與其乘法配對!

8 ÷ 4 = 2
除法
12 ÷ 3 = 4
除法
5 × 3 = 15
乘法
4 × 2 = 8
乘法
3 × 4 = 12
乘法
10 ÷ 5 = 2
除法
6 ÷ 2 = 3
除法
5 × 2 = 10
乘法
9 ÷ 3 = 3
除法
15 ÷ 5 = 3
除法
3 × 3 = 9
乘法
2 × 3 = 6
乘法

📝 Division Word Problems 除法應用題

Let's solve some real-world division problems!讓我們解決一些實際生活中的除法問題!

Problem 1 of 3
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Problem:

Mrs. Lee has 15 oranges. She wants to give an equal number of oranges to 3 children. How many oranges will each child get?

李老師有15個橙子。她想給3個孩子相同數量的橙子。每個孩子會得到多少個橙子?

🔑 Key Concepts 重要概念

Division 除法

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    Division means sharing or grouping equally

    除法意味著平均分享或分組

  • The division sign is ÷

    除法符號是 ÷

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    Division can result in a remainder

    除法可能有餘數

    Example: 7 ÷ 2 = 3 remainder 1

    1234567

Division Terms 除法術語

Dividend被除數12
÷
Divisor除數3
=
Quotient4
Remainder餘數0
Division Equation
Multiplication Check
  • Dividend

    被除數:被除的數

  • Divisor

    除數:我們用來除的數

  • Quotient

    商:除法的結果

  • Remainder

    餘數:剩餘的量

👨‍🏫 Teacher's Corner 教師角落

Teaching Tips 教學提示

  • Start with physical objects that children can actually share or group
  • Use visual representations like counters, drawings, or number lines
  • Link division to sharing situations from students' everyday experiences
  • Always connect division to multiplication to reinforce the relationship
  • Introduce division problems with no remainders before moving to problems with remainders
  • Encourage students to check division answers by multiplication

Extension Activities 延伸活動

  • Division Bingo: Create bingo cards with division problems除法賓果:創建帶有除法問題的賓果卡
  • Real-life division: Have students share objects equally in class現實生活中的除法:讓學生在課堂上平均分享物品
  • Division stories: Students create their own division word problems除法故事:學生創建自己的除法應用題
  • Shopping game: Give students a budget and have them "buy" equal numbers of items購物遊戲:給學生預算,讓他們"購買"相同數量的物品
  • Division drawing: Draw pictures to represent division problems除法繪畫:繪製圖片來表示除法問題