Decimal numbers are numbers that are not whole. 3, 7, 9 and 10 are whole numbers. 3.4, 7.1, 9.2 and 10.3 are decimal numbers. Can you spot the difference? The decimal numbers have a 'dot' which is called a decimal point. Adding and subtracting decimal numbers is just like doing it with whole numbers, for example 11 + 12 = 23 and 1.1 + 1.2 = 2.3. Decimal numbers can also be changed into the whole number they are closest to. We call this rounding up or down. For example, 4.7 would be rounded up to 5 but 4.4 would be rounded down to 4. Decimal numbers contain decimal points, on the left of... Show more Decimal numbers are numbers that are not whole. 3, 7, 9 and 10 are whole numbers. 3.4, 7.1, 9.2 and 10.3 are decimal numbers. Can you spot the difference? The decimal numbers have a 'dot' which is called a decimal point. Adding and subtracting decimal numbers is just like doing it with whole numbers, for example 11 + 12 = 23 and 1.1 + 1.2 = 2.3. Decimal numbers can also be changed into the whole number they are closest to. We call this rounding up or down. For example, 4.7 would be rounded up to 5 but 4.4 would be rounded down to 4. Decimal numbers contain decimal points, on the left of which are units and on the right tenths, hundredths and thousandths. We use decimal numbers as an alternative to fractions to describe numbers that are smaller than a unit. For example, the fraction 1⁄8 could also be written as 0.125. Here we have 1 tenth, 2 hundredths and 5 thousandths. Decimal numbers make addition, subtraction, multiplication and division of fractions much easier. For this reason we have decimal measurements like meters and kilos which all use tenths, hundredths and thousandths. Decimal numbers are those that are smaller than a unit and are written after a decimal point. Decimal numbers are an alternative way of writing fractions. A quarter of a pizza written as a fraction would be 1⁄4, but written as a decimal would be 0.25. 0.25 is a decimal with two places - the 2 represents 2 tenths and the 5 is 5 hundredths. The first number to the right of the dp is in the tenths place position, e.g. 5 in 3.5 The second number to the right of the dp is in the hundredths place position, e.g. 4 in 3.54 The third number to the right of the dp is in the thousandths place position, e.g. 7 in 3.547 Show less
Decimal numbers are numbers that are not whole. 3, 7, 9 and 10 are whole numbers. 3.4, 7.1, 9.2 and 10.3 are decimal numbers. Can you spot the difference? The decimal numbers have a 'dot' which is called a decimal point. Adding and subtracting decimal numbers is just like doing it with whole numbers, for example 11 + 12 = 23 and 1.1 + 1.2 = 2.3. Decimal numbers can also be changed into the whole number they are closest to. We call this rounding up or down. For example, 4.7 would be rounded up to 5 but 4.4 would be rounded down to 4.
Decimal numbers contain decimal points, on the left of which are units and on the right tenths, hundredths and thousandths. We use decimal numbers as an alternative to fractions to describe numbers that are smaller than a unit. For example, the fraction 1⁄8 could also be written as 0.125. Here we have 1 tenth, 2 hundredths and 5 thousandths. Decimal numbers make addition, subtraction, multiplication and division of fractions much easier. For this reason we have decimal measurements like meters and kilos which all use tenths, hundredths and thousandths.
Decimal numbers are those that are smaller than a unit and are written after a decimal point. Decimal numbers are an alternative way of writing fractions. A quarter of a pizza written as a fraction would be 1⁄4, but written as a decimal would be 0.25. 0.25 is a decimal with two places - the 2 represents 2 tenths and the 5 is 5 hundredths.
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