Addition and subtraction (T2 W1)
Progress: 0/7 checkpoints complete (0%).
0/400
0/400
0/400
0/400
0/400
0/400
0/400
0 due | 0 overdue
No due spaced reviews.
No recommendations right now.
No baseline score yet.
No topic mastery records yet.
No adaptive path suggestions yet.
Move from lesson study to exam practice in Mathematics.
No direct subject mapping found yet. Browse past papers to pick province and subject.
Addition is the process of combining two or more numbers to find a total. For example, if you have 2 apples and you get 3 more, you can add them together to find out you have 5 apples in total. Subtraction, on the other hand, is taking away a number from another. If you have 5 apples and you give away 2, you subtract 2 from 5 to find out you have 3 apples left. We can use objects, drawings, or fingers to help us understand these concepts 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. We can also write this as a number sentence: 4 + 3 = 7.
Now, let's consider the problem: 6 - 2. We can start with 6 counters. If we take away 2 counters, we can count how many are left: 1, 2, 3, 4. So, 6 - 2 = 4. We can write this as a number sentence: 6 - 2 = 4.
Let's practice together! Solve the following addition problem: 2 + 5. Use your fingers or draw dots to help you. Count all the dots together. What do you get? (Wait for responses) That's right! 2 + 5 = 7. Now, let's try another one: 3 + 4. How can we visualize this? (Encourage students to use counters or drawings.)
Now, let's do a subtraction problem together: 8 - 3. Start with 8 counters. If we take away 3, how many do we have left? (Encourage students to use their counters.) Count them together. Yes! 8 - 3 = 5. Let's try another one: 5 - 2. What do you think? (Guide students through the process.)
Now it's your turn! Solve the following problems on your own. Remember to show your working: 1) 7 + 2 = ? 2) 10 - 4 = ? 3) 3 + 6 = ? 4) 9 - 5 = ? After you finish, check your answers with a partner and discuss any mistakes. Remember, it's okay to make mistakes; we learn from them!
Answer: 5
When you add 3 and 2 together, you get 5.
Answer: 7
Subtracting 3 from 10 leaves you with 7.
Answer: 8
Adding 4 and 4 gives you a total of 8.
Answer: 3
If you take away 2 from 5, you have 3 left.
Answer: 7
Adding 1 to 6 results in 7.
Answer: 5
When you subtract 4 from 9, you get 5.
Answer: 5
Adding 2 and 3 gives you a total of 5.
Answer: 6
If you take away 1 from 7, you have 6 left.