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.
