Also known as counting numbers.

Numbers that cannot be written as a ratio of two integers.

A set that includes all the elements of natural numbers plus the number zero.

A number written with nonzero digit to the left of the decimal point multiplied by a power of 10.

The length from the elbow to the tip of the middle finger.

The length from the tip of the thumb to the tip of the little fnger of an outstretched hand.

Length across a person’s outstretched arms.

The length from the tip to the first joint of the thumb.

The length of a foot.

What are the numerical coefficients present in $$-4abc+2xy$$  ?

What are the literal coefficients present in $$-7mnx$$  ?

How many terms does $$6wxy+8xy+9wy$$  have?

Write $$0.0000503$$  in scientific notation.