Mathematics - Term 3 - Week 7

Number sense is the ability to understand and work with numbers. It involves recognizing numbers, understanding their relationships, and being able to manipulate them in various ways. For example, knowing that 10 is greater than 5, or that 3 + 2 equals 5. This week, we will explore how to count forwards and backwards, and how to group numbers to make counting easier.

Let's say we have 15 apples. We can count them in groups of 5. If we group the apples, we have 3 groups of 5. This helps us see that 15 can be broken down into smaller, more manageable parts. To visualize this, we can draw 15 circles and group them into sets of 5. This method makes counting easier and helps us understand addition better.

In pairs, discuss how you would count 24 marbles. Think about grouping them in different ways. For example, you could group them in sets of 6. How many groups would you have? After discussing, share your strategies with the class. This will help us learn from each other and see different ways to approach counting.

Now, solve the following problems on your own. Remember to show your working clearly. 1. If you have 30 candies and you want to share them equally among 5 friends, how many candies does each friend get? 2. Count backwards from 20 to 1. Write down the numbers you counted. 3. If you have 12 pencils and you lose 4, how many do you have left? Show your working for each problem.

• 10
• 12
• 13
• 14

Answer: 12

7 plus 5 equals 12.

• 4
• 5
• 6
• 7

Answer: 5

20 divided by 4 equals 5.

Answer: 15, 14, 13

Counting backwards starts from 15 and goes down.

• 7
• 8
• 9
• 10

Answer: 8

The sequence increases by 2 each time.

Answer: 7

10 minus 3 equals 7.

• 18
• 21
• Both are equal
• None of the above

Answer: 21

21 is greater than 18.

• 2
• 3
• 4
• 5

Answer: 5

50 divided by 10 equals 5.

Answer: 5

9 minus 4 equals 5.