### Addition and subtraction

**Question 1: What is addition?**

Answer: Addition is a mathematical operation where we combine two or more numbers to find the total.

**Question 2: What is subtraction?****Answer**: Subtraction is a mathematical operation where we take away one number from another to find the difference.

**Question 3: How do we add two numbers?****Answer**: To add two numbers, we simply combine them. For example, if we have 3 apples and we add 2 more, we will have a total of 5 apples.

**Question 4: How do we subtract two numbers?****Answer**: To subtract two numbers, we take away one number from the other. For example, if we have 7 chocolates and we eat 3 of them, we will be left with 4 chocolates.

**Question 5: What happens when we add or subtract zero?****Answer**: When we add or subtract zero from a number, the number remains the same. For example, if we add zero to 5, we still have 5. Similarly, if we subtract zero from 8, we still have 8.

### Multiplication and division

**Question 1: What is multiplication?****Answer**: Multiplication is a mathematical operation where we combine equal groups of numbers to find the total.

**Question 2: What is division?****Answer**: Division is a mathematical operation where we split a number into equal groups or find how many times one number can be divided by another.

**Question 3: How do we multiply two numbers?****Answer**: To multiply two numbers, we repeat the addition of one number for as many times as the other number tells us. For example, if we have 3 bags with 4 candies each, we can multiply 3 by 4 to find the total number of candies, which is 12.

**Question 4: How do we divide two numbers?****Answer**: To divide two numbers, we share or split them into equal groups. For example, if we have 12 candies and want to share them equally among 3 friends, each friend will get 4 candies. So, 12 divided by 3 is 4.

**Question 5: What happens when we multiply or divide a number by 1?****Answer**: When we multiply a number by 1, the number remains the same. Similarly, when we divide a number by 1, the number also remains the same. 1 is known as the identity element for multiplication and division.

### Highest common factors

### Lowest common multiples

### Order of operation and brackets

- Simplify: 2 + 5 x 3 – 4.
- Evaluate: (9 – 2) x 4 + 12 ÷ 6.
- Simplify: 4 + 6 x (10 ÷ 2) – 3.
- Evaluate: (12 – 3 + 2) x (8 ÷ 4).
- Simplify: 7 x (10 – 5) + 9 ÷ 3.