Test: Number, Decimal Numbers - Year 5 MCQ

The example 15.35 can be regrouped as 10 ones + 5 ones + 3 tenths + 5 hundredths. This demonstrates how regrouping allows for different representations of the same value, making it easier to perform calculations and understand the composition of numbers.

The decimal number 0.75 is read as "zero point seven five," which helps clarify the presence of the leading zero in the ones position. This is important for distinguishing the value of the number, especially in mathematical contexts.

The term "hundredths" refers to one part of a hundred in decimal notation, represented as 0.01. For example, 0.25 consists of 25 hundredths. This concept is vital for understanding how decimals relate to fractions and percentages, reinforcing the idea of parts of a whole in mathematics.

If the tenths digit of a decimal number is 5 or greater, the rule is to round up to the next whole number. For instance, the number 4.8 rounds to 5, and 23.5 rounds to 24. This rounding rule helps in estimating values and is widely used in everyday calculations.

In the number 234,045, the digit 6 is in the hundred-thousands place, representing six hundred. Understanding place value is crucial in mathematics as it helps in accurately interpreting and manipulating numbers, ensuring correct calculations.

Dividing a decimal number by 100 shifts the digits two places to the right. For example, dividing 48 by 100 results in 0.48. This operation illustrates how the decimal point moves, effectively reducing the number's value by a factor of 100, which is essential in calculations involving percentages and smaller units.

If the sequence starts at 30 and the rule is to subtract 4, the sixth term is calculated as follows: 30, 26, 22, 18, 14, and finally 10. Thus, the sixth term is 10. Understanding sequences and their rules is essential for recognizing patterns in mathematics.

The decimal number 1.25 consists of a whole number part, which is 1 (one), and a fractional part, which includes 2 tenths and 5 hundredths. This means that 1.25 is made up of 1 whole, 0.2 (representing 2 tenths), and 0.05 (representing 5 hundredths), confirming that the fractional part is indeed 2 tenths and 5 hundredths.

When a decimal number is multiplied by 10, the digits shift one place to the left. For example, multiplying 5.3 by 10 results in 53. This shift effectively increases the value of the number tenfold, making it crucial in both arithmetic calculations and understanding place value.

The decimal 1.25 can be expressed as a fraction by recognizing it as 125/100, which simplifies to 5/4. This conversion is important for understanding the relationship between decimals and fractions, which is a fundamental concept in mathematics.

The decimal number 1.25 consists of a whole number part and a fractional part. In this case, the whole number part is 1, and the fractional part is made up of 2 tenths (0.2) and 5 hundredths (0.05). Therefore, the correct answer is that the fractional part of 1.25 includes 2 tenths and 5 hundredths.

The correct way to read the decimal number 90.48 is "Ninety point four eight." In reading decimals, the whole number part is stated first, followed by the word "point," and then each digit in the fractional part is read separately.

When a decimal number is multiplied by 10, the decimal point shifts one place to the right. For example, multiplying 5.3 by 10 gives 53. This shifting indicates that the overall value of the number increases by a factor of ten, which is a fundamental concept in understanding decimal multiplication.

The rule for rounding states that if the tenths digit is 5 or greater, you round up to the next whole number. Since 4.8 has an 8 in the tenths place, it rounds up to 5. This rounding rule is crucial for estimating values and simplifying calculations in mathematics.

The term-to-term rule for the sequence 30, 26, 22, 18 involves subtracting 4 from each term to arrive at the next term. This consistent difference indicates it is a linear sequence, where each term decreases by the same amount, which is an important concept in understanding patterns and sequences in mathematics.