Mathematics - Term 1 - Week 3

Addition is the process of combining two or more numbers to find a total, while subtraction is the process of taking one number away from another. For example, if we have 3 apples and we add 2 more apples, we have a total of 5 apples. In contrast, if we start with 5 apples and take away 2, we are left with 3 apples. Visual models, such as number lines or counters, can help us understand these operations better.

Let's look at the problem: 4 + 3. We can use counters to visualize this. If we have 4 counters and we add 3 more, we can count all the counters together: 1, 2, 3, 4, 5, 6, 7. So, 4 + 3 = 7. Now, let's write it down: 4 + 3 = 7.

Now, consider the subtraction problem: 6 - 2. We can start with 6 counters. If we take away 2 counters, we count what remains: 1, 2, 3, 4. Thus, 6 - 2 = 4. We can write this as: 6 - 2 = 4.

Let's solve a few problems together. First, try 5 + 2. Use your fingers or counters to help you. Count 5, then add 2 more. What do you get? (Wait for responses.) Great! Now, let's try 7 - 3. Start with 7 counters and take away 3. How many do you have left? (Discuss answers and correct any mistakes.)

Now it's your turn to solve some problems on your own. Complete the following: 1) 8 + 1 = ? 2) 10 - 4 = ? 3) 3 + 5 = ? 4) 9 - 6 = ? Remember to show your working clearly. After you finish, we will review your answers together.

• 4
• 5
• 6
• 7

Answer: 5

When you add 2 and 3 together, you get 5.

• 5
• 6
• 4
• 3

Answer: 5

Subtracting 2 from 7 leaves you with 5.

Answer: 8

Adding 4 and 4 together gives you a total of 8.

Answer: 5

When you take away 5 from 10, you are left with 5.

• 4
• 5
• 6
• 7

Answer: 5

3 apples plus 2 apples equals 5 apples.

• 6
• 5
• 4
• 3

Answer: 6

Subtracting 3 from 9 results in 6.

Answer: 10

Adding 5 and 5 gives you a total of 10.

Answer: 6

When you subtract 2 from 8, you are left with 6.