Test: Numbers and The Number System - Year 4 MCQ

Dividing a number by 100 causes the digits to shift two places to the right. For example, dividing 3400 by 100 results in 34, demonstrating how division affects the positional value of each digit in a number.

A linear sequence is defined by having a constant difference between consecutive terms, which can be described with a term-to-term rule such as "add 2" or "subtract 3." This structure enables predictable extensions of the sequence, making it easier to identify subsequent terms.

The term-to-term rule for the linear sequence starting at 8, which generates the terms 8, 6, 4, 2, 0, …, is "subtract 2." Each term is obtained by subtracting 2 from the previous term, demonstrating a constant difference that characterizes linear sequences.

The term-to-term rule refers to the specific operation applied to derive the next number in a sequence. For example, in a sequence where the rule is "add 3," this operation clearly defines how each subsequent term is generated.

Square numbers form a non-linear sequence where the difference between consecutive terms varies (e.g., 1, 4, 9, 16 has differences of 3, 5, 7, ...). This lack of constant difference distinguishes it from linear sequences, as the amount added increases each time.

When a number is multiplied by 10, all digits shift one place to the left, effectively increasing the value of the number. For instance, multiplying 606 by 10 results in 6060, where the digit positions change to reflect this multiplication.

Decomposing a number involves breaking it down into its place value components. For 805,469, the correct decomposition is 800,000 + 5,000 + 400 + 60 + 9, which clearly shows the value each digit contributes based on its position.

The term-to-term rule for the sequence 60, 110, 160 involves adding 50 to each term to get the next one. This consistent addition illustrates a linear sequence where the difference remains constant, allowing for straightforward prediction of future terms.

Negative numbers are used to represent positions below sea level, such as elevation measurements. For instance, a depth of -20 meters indicates a location that is 20 meters beneath sea level, providing a critical understanding of geographic measurements.

In the number 805,469, the digit 4 is in the hundreds place, so its place value is 400. Decomposing the number into its place value components (800,000 + 5,000 + 400 + 60 + 9) confirms that the digit 4 contributes 400 to the total value, illustrating the concept of place value in large numbers.

On a number line, negative numbers are positioned to the left of zero, while positive numbers are located to the right. This visual representation helps in understanding operations involving negative numbers, such as subtraction and addition. For instance, moving to the left on the number line represents decreasing values, while moving to the right indicates increasing values. This concept is crucial for grasping real-world scenarios like temperatures below freezing.

The sequence beginning at 10 with the rule of "subtracting 5" would generate the terms 10, 5, 0, and -5. Each term is derived by subtracting 5 from the previous term. This exercise illustrates how a simple rule can create a sequence that may include negative numbers, enhancing the understanding of mathematical operations and their implications in various contexts.

When you multiply a number by 100, its digits shift two places to the left, effectively increasing its value and adding two zeros to the end. For example, if you multiply 35 by 100, you get 3500. This operation demonstrates the concept of place value and how it affects the magnitude of numbers, which is foundational in arithmetic and algebra.

A non-linear sequence is characterized by a varying difference between its terms. Unlike linear sequences, where the difference is consistent, non-linear sequences may increase or decrease by different amounts. An example would be the sequence 1, 4, 9, 16, where the differences between terms are 3, 5, and 7, respectively. Recognizing these patterns is essential for advancing in mathematical studies, as they lead to more complex functions and behaviors in mathematics.

Negative numbers are used to describe positions below sea level, such as −20 meters indicating 20 meters beneath the ocean surface. This is an important real-world application of negative numbers, distinct from their use in temperature contexts.