The counting numbers from 1 to 20 are called natural numbers.
There are larger sets that include the numbers from 1 to 20, but have other members as well.
For example, the integers contain 1 through 20, but also all numbers 21, 22, 23, ...
The set of real numbers includes all numbers on the number line, which includes 0 and negative numbers and Irrational Numbers like pi, but also includes 1 through 20. Etc.
20
Those would be all the odd numbers: 1, 3, 5, etc. (continue counting by 2's).
210
I'm a tit.
It is 155 greater.
20 and 100.GCF is 20, and LCM is 100.
Real numbers, Rational numbers, Integers, Counting numbers, Composite numbers, multiples of 5.
1,4,5
To encourage your 20-month-old to start counting to 10, you can use simple counting games, toys, and books that involve numbers. Repeat counting aloud with your child and praise their efforts. Make counting a fun and interactive experience to keep them engaged and interested in learning numbers.
The numbers are 20 and 21.
Well, honey, the sum of counting numbers from 1 to 20 is 210. You add up 1 + 2 + 3... all the way to 20 and you get your answer. So, go ahead and impress your friends with your newfound math knowledge.
The numbers are 18 and 20.