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Class 4 Maths Poster Chapter 7 Addition and Subtraction

Class 4 Maths Poster Chapter 7 Addition and Subtraction

The document Class 4 Maths Poster Chapter 7 Addition and Subtraction is a part of the Class 4 Course Mathematics for Class 4.
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FAQs on Class 4 Maths Poster Chapter 7 Addition and Subtraction

1. What are the basic rules for addition and subtraction in mathematics?
Ans. The basic rules for addition and subtraction involve combining numbers for addition and taking away for subtraction. In addition, if you have two numbers, you simply sum them up to get a total. For subtraction, you take one number away from another. It's important to remember that addition is commutative (the order doesn't matter) while subtraction is not (the order does matter).
2. How do you perform addition and subtraction with negative numbers?
Ans. When adding negative numbers, you essentially subtract their absolute values. For example, adding -3 to 5 results in 5 - 3 = 2. When subtracting negative numbers, you change the subtraction to addition. For example, subtracting -3 from 5 becomes 5 + 3 = 8.
3. Can you explain the concept of regrouping in addition and subtraction?
Ans. Regrouping, also known as carrying in addition and borrowing in subtraction, is a technique used when the sum exceeds 9 in addition or when you need to subtract a larger digit from a smaller one in subtraction. In addition, you carry over to the next left column. In subtraction, if you can't subtract, you borrow from the next left column.
4. What are some common word problems involving addition and subtraction?
Ans. Common word problems include scenarios like calculating total costs, determining distances, or finding out how many items are left after some have been taken away. For example, if you have 10 apples and you give away 3, you would use subtraction to find out you have 7 apples left.
5. How do I check my work after performing addition or subtraction?
Ans. To check your addition, you can perform the inverse operation of subtraction. For example, if you added 7 + 5 to get 12, you can check your work by doing 12 - 7 to see if you return to 5. For subtraction, you can add the result to the subtracted number to confirm it adds back to the original number.
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