Decimal numbers are numbers with a whole part and a decimal part separated by a decimal point, used to represent quantities that are not whole. For example, in 3.75 the whole part is 3 and the decimal part is 75, which equals 75 hundredths. The digits to the right of the point represent tenths, hundredths, thousandths, and so on.
An everyday example
Decimals show up all the time: the price of bread can be $12.50, a child's height 1.35 m, and body temperature 36.6 °C. If you divide a pizza into 10 equal slices and eat 3, you have eaten 0.3 (three tenths) of the pizza. Each place to the right of the point is worth 10 times less than the one before: 0.1 is a tenth and 0.01 is a hundredth. A handy fact: the fraction 1/2 is written as 0.5 and 1/4 as 0.25.
Why does it matter for kids?
Decimal numbers are taught from 4th grade and are essential for handling money, measuring precisely, and understanding percentages later on. Without them we couldn't express halves, quarters, or the exact result of many divisions. Mastering them prepares kids for fractions, statistics and science. At Algonova kids practice decimals by solving real problems with coding, and combine them with geometry when measuring the perimeter and area of their shapes.
