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Test: Addition and Subtraction of Whole Numbers - Year 4 MCQ


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10 Questions MCQ Test Year 4 Mathematics IGCSE (Cambridge) - Test: Addition and Subtraction of Whole Numbers

Test: Addition and Subtraction of Whole Numbers for Year 4 2025 is part of Year 4 Mathematics IGCSE (Cambridge) preparation. The Test: Addition and Subtraction of Whole Numbers questions and answers have been prepared according to the Year 4 exam syllabus.The Test: Addition and Subtraction of Whole Numbers MCQs are made for Year 4 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Addition and Subtraction of Whole Numbers below.
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Test: Addition and Subtraction of Whole Numbers - Question 1

Which statement about even and odd numbers is true?

Detailed Solution for Test: Addition and Subtraction of Whole Numbers - Question 1

The correct statement is:

d) Odd + Odd = Even

Explanation:

  • d) Odd + Odd = Even — True. Example: 3 + 5 = 8

  • b) Even + Odd = Even — false. Example: 2 + 3 = 5

  • a) Even + Even = Odd — False. Example: 4 + 6 = 10

Test: Addition and Subtraction of Whole Numbers - Question 2

What does the term "decompose" mean in the context of addition and subtraction?

Detailed Solution for Test: Addition and Subtraction of Whole Numbers - Question 2

"Decompose" refers to breaking a number into its place value components, such as hundreds, tens, and ones. For instance, the number 235 can be decomposed into 200, 30, and 5. This technique helps students understand the structure of numbers and simplifies the process of addition and subtraction by allowing them to add or subtract each component separately.

Test: Addition and Subtraction of Whole Numbers - Question 3

What is the outcome when adding three odd numbers?

Detailed Solution for Test: Addition and Subtraction of Whole Numbers - Question 3

Adding three odd numbers always results in an odd number. For example, 1 + 3 + 5 = 9 and 11 + 23 + 35 = 69. This is because each odd number has a remainder of 1 when divided by 2, and the sum of three such remainders (3) is odd, ensuring the total sum is odd. This generalisation holds for all cases, as confirmed by testing multiple examples.

Test: Addition and Subtraction of Whole Numbers - Question 4

What is the missing number in the equation 30 − _ = 27?

Detailed Solution for Test: Addition and Subtraction of Whole Numbers - Question 4

To find the missing number in the equation 30 − _ = 27, rewrite it as a subtraction problem: 30 − 27 = _. This gives 3, so the missing number is 3. Alternatively, using a number line, count from 27 to 30, which requires adding 3. This demonstrates the inverse relationship between addition and subtraction.

Test: Addition and Subtraction of Whole Numbers - Question 5

What is a "counter-example"?

Detailed Solution for Test: Addition and Subtraction of Whole Numbers - Question 5

A counter-example is an example that disproves a statement. For instance, if someone claims that adding three odd numbers results in an even number (e.g., 50), a counter-example like 1 + 3 + 5 = 9 (odd) disproves it. Counter-examples are essential for testing generalisations about odd and even numbers to ensure their accuracy.

Test: Addition and Subtraction of Whole Numbers - Question 6

What symbol can be used to represent a missing number in an equation?

Detailed Solution for Test: Addition and Subtraction of Whole Numbers - Question 6

A blank space is commonly used to represent a missing number in equations, such as 30 − _ = 27. Other symbols like a square or circle can also be used, but a blank space is a standard choice that helps students focus on solving for the unknown. This practice introduces algebraic thinking, preparing students for more complex equations.

Test: Addition and Subtraction of Whole Numbers - Question 7

Which method can be used to find the missing number in the equation 650 + _ = 1000?

Detailed Solution for Test: Addition and Subtraction of Whole Numbers - Question 7

To find the missing number in the equation 650 + _ = 1000, you can rewrite the equation as a subtraction problem: 1000 - 650 = _. This gives the answer of 350. This method is effective because it transforms the problem into a more straightforward calculation, demonstrating the inverse relationship between addition and subtraction.

Test: Addition and Subtraction of Whole Numbers - Question 8

What is the result when two odd numbers are added together?

Detailed Solution for Test: Addition and Subtraction of Whole Numbers - Question 8

When two odd numbers are added together, the result is always an even number. For example, 3 + 5 = 8 and 7 + 9 = 16. This is because the sum of two odd integers results in a total that can be evenly divided by 2, illustrating a consistent pattern in number theory. This property is crucial for understanding more complex mathematical concepts.

Test: Addition and Subtraction of Whole Numbers - Question 9

What is the term used for breaking a number into its place value components?

Detailed Solution for Test: Addition and Subtraction of Whole Numbers - Question 9

The term used for breaking a number into its place value components is "decomposing." For instance, the number 235 can be decomposed into 200 + 30 + 5. This technique aids in understanding the value of each digit in a number and is especially useful in addition and subtraction calculations, as it simplifies the arithmetic process.

Test: Addition and Subtraction of Whole Numbers - Question 10

In the context of addition and subtraction, what does "regrouping" refer to?

Detailed Solution for Test: Addition and Subtraction of Whole Numbers - Question 10

"Regrouping" refers to the process of rearranging numbers during calculations to facilitate addition or subtraction, such as when borrowing in subtraction or carrying in addition. For example, in the subtraction problem 459 - 318, regrouping is necessary to handle the borrowing when subtracting 8 from 9. This method allows students to manage calculations more effectively and enhances their overall numerical skills.

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