The set of whole numbers include the natural numbers and 0. Call this set W, then W = { 0,1,2,3,4,5,6,......}
A representation of the number 4

1 cube: physical representation of 1 
1 long : physical representation of 10 Made of 10 cubes. 
1 flat : physical representation of 100 Made of 100 cubes. 
1 block: physical representation of 1000 Made of 1000 cubes. 
Place value
Start with this lesson. Then, study the following lessons in the order listed here from top to bottom.
Reading and writing whole numbers
Learn how to read and write numbers.
Adding whole numbers
Learn to add numbers with or without regrouping.
Subtracting whole numbers
Learn to subtract numbers with or without regrouping.
Multiplying whole numbers
Learn to multiply numbers with some great illustrations.
Lattice method for multiplication
After you learn the standard multiplication algorithm, entertain yourself with this fun and old way of doing multiplication.
Russian peasant multiplication
Learn to multiply with the Russian peasant algorithm.
Duplication algorithm for multiplication
Learn to multiply with the duplication algorithm.
Dividing whole numbers
Learn to divide numbers with good illustrations.
Finding the average
A crystal clear lesson on how to find the average of numbers.
Weighted mean
How to find the weighted mean.
Even and odd numbers
Learn the difference between even and odd numbers and see formal definitions for even and odd numbers.
Extras topics
Aug 09, 16 01:40 PM
Average age of Dipu and Apu is 22 years. Average age of Dipu and Tipu is 24 years. Age of Dipu is 21 years. What are the ages of Apu, and tipu ? Let
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