Mathematics - Term 2 - Week 9

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. In this lesson, we will explore how to count forwards and backwards, recognize patterns in numbers, and understand the value of each digit in a number.

Let's look at counting forward from 1 to 20. We can say: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20. Now, let's count backward from 20 to 1: 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1. Notice how the numbers decrease as we count backward. This helps us understand the concept of subtraction.

Now, let's use a number line to visualize counting. Draw a number line from 0 to 20 on the board. Ask students to identify the numbers as you point to them. Then, have them practice counting by twos using the number line: 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20. This visual representation helps solidify their understanding of counting in increments.

Give students a worksheet with various counting problems. For example, 'Count how many apples are in the basket if there are 5 red apples and 3 green apples.' Students should write down their answers and show their working. Encourage them to check their answers and correct any mistakes they find.

• 7
• 8
• 9
• 10

Answer: 8

The sequence is counting by twos, so after 6 comes 8.

• 4
• 5
• 6
• 7

Answer: 5

Each hand has 5 fingers.

Answer: 10, 9, 8, 7, 6, 5, 4, 3, 2, 1

Counting backward from 10 involves decreasing each number by 1.

• 6
• 7
• 8
• 9

Answer: 8

Adding 5 and 3 gives a total of 8.

Answer: 6

You add the 4 apples to the 2 new apples to get 6.

• 15
• 12
• Both are equal
• None of the above

Answer: 15

15 is greater than 12.

• 3
• 20
• 23
• 2

Answer: 20

The digit 3 is in the tens place, which represents 20.

Answer: 1, 2, 3, 4, 5

These are the first five natural numbers.