Order and Compare Numbers up to 10 Million 8 - Reasoning

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Maths
Year 6
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Order and Compare Numbers up to 10 Million 8 - Reasoning
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Maths Resource Description

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The assertion that one must look at the lowest place value column first when ordering numbers is a common misconception. In fact, the correct approach is to start comparing numbers from the highest place value column. This is because the value of digits in higher place value columns has a greater impact on the overall value of the number. For example, consider the numbers 9,343,576 and 8,343,576. To determine which number is greater, we should compare the digits from the highest place value column, which is the millions place in this case. Since 9 is larger than 8 in the millions column, we can conclude that 9,343,576 is greater than 8,343,576 without needing to look at the lower place value columns. This example clearly demonstrates that the highest place value columns should be examined first to accurately order numbers.

It is important to understand the hierarchy of place values when comparing and ordering numbers. Each place value column, moving from right to left, represents a higher power of ten. Therefore, a digit in the millions place has a significantly greater value than a digit in the thousands, hundreds, tens, or ones place. When two numbers differ in a higher place value column, the number with the larger digit in that column will always be greater, regardless of the digits in the lower place value columns. This principle is crucial when working with large numbers and ensures that students can correctly order and compare numbers up to 10 million or beyond.