An idiomatic expression is a phrase or expression whose meaning cannot be understood from the literal meanings of its individual words. These phrases often have a cultural significance and are commonly used in everyday language. Examples include:
(four times ten)less twenty
how do the ten amendments work in society
dessert
Ten examples are: a rock, wood, ice, iron ore, cooled glass, pencil, pen, clothing, sand, and tile.
education career settlement family children health care insurance safety support
x + 10
10n
10,000 = ten-thousand
The expression is: 10-x
Onomatopoia is easy. It's basically just sounds, I'll give you examples to get started. Pow! Bang! Smash! Wham! Bam! Zip! Zap! Boom! Zoom! and Whap! are all good examples.
Wow! Ouch! Hey! Hooray! Yikes! Phew! Oops! Ah! Alas! Oh.
You can give hundreds of examples, but a single counterexample shows that natural numbers are NOT closed under subtraction or division. For example, 1 - 2 is NOT a natural number, and 1 / 2 is NOT a natural number.