Test: Number, Introducing Decimal Numbers - Year 5 MCQ

Counting on in tenths progresses through decimal increments, such as 0.1, 0.2, 0.3, allowing for precise measurement and understanding in decimal arithmetic.

One-tenth is represented as 0.1 in decimal form. Understanding decimal representations is essential for working with fractions in mathematics.

The number 42.4 consists of 42 ones and 4 tenths, demonstrating how to break down decimals into more manageable parts for clearer understanding.

The decomposition of 40,000 + 5,000 + 0 + 40 + 3 equals 45,043. This breakdown is useful for understanding the components of large numbers.

Multiplying a number by 100 moves each digit two places to the left, effectively increasing the value of the number significantly. For example, 45 becomes 4500 when multiplied by 100.

Regrouping allows numbers to be represented in various ways using their place value parts, enhancing comprehension of number relationships and operations.

Counting back in steps of 200 from 1,000 results in the sequence 1,000, 800, 600, demonstrating how to effectively manage larger intervals in counting.

The constant difference between the first term (5) and the second term (12) is 7. Recognizing this difference is crucial for defining the rule of the sequence.

Dividing 5,380 by 10 shifts the digits one place to the right, resulting in 538. This operation is fundamental in understanding how division affects place value.

The number 4.4 can be decomposed into 4 ones (which equals 40 tenths) and 4 tenths, giving a total of 44 tenths. Understanding this helps in converting between decimals and fractions.

Counting on in fives starting from 5 gives us 5, 10, 15, 20, 25. The fifth term is therefore 25, which illustrates the pattern of adding a constant.

Multiplying 472 by 1,000 shifts the digits three places to the left, resulting in 472,000. This multiplication highlights how scaling numbers affects their size significantly.

The decimal 0.4 is read as "zero point four" to clarify that there is no whole number part, which is a common practice in reading decimals accurately.

Dividing by 100 makes a number smaller by shifting the digits two places to the right, effectively decreasing its value, which is a key concept in division.

The decimal number 2.6 consists of 2 in the ones place and 6 in the tenths place, which means it represents 2 ones and 6 tenths. This understanding of place value is crucial for working with decimals effectively.