We can count from <span>668 to 900 using ones, tens, and hundreds. if we add 2 ones to 668= 668 + 2 = the number will be 670 and then add 3 tens = 670 + 30 = 700, the number will be 700 now add 2 hundreds, 700 + 200 = 900 So the way is: 668 + 2 ones = 670 670 + 3 tens = 700 700 + 2 hundreds = 900 or 668 + 2 hundreds = 868 868 + 3 tens = 898 898 + 2 ones = 900</span>