
Method:
123,000; 223,000; 323,000; 423,000,___ Look at the numbers in the above sequence. Here the difference between one number to the next is 100,000, therefore, it is skip counting by 100,000. That is, to each number we have to add 100,000 to get the next number. In the above example, 223,000  123,0006000 = 100,000 323,000  223,0006000 = 100,000 423,000  323,0006000 = 100,000 Hence, to each number we have to add 1000 to get the next number. 423,000 + 100,000 = 523,000 Answer: 523,000
Directions: Find the missing number. Also write at least ten examples of your own. 