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.
The numbers are 18 and 20.
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.