Skip-counting by tens represents a sequence in which each successive whole number is 10 greater, or 10 less when counting backward, typically extending from 0 through 1,000 and including transitions such as 190, 200, and 210. The pattern connects repeated addition with place value: the tens digit changes by one while the ones digit remains unchanged, supporting efficient counting, comparison, and later understanding of multiplication by 10; decimals, negative numbers, and unrestricted larger numbers are not included.
Skip-counting by s means adding each time. The ones digit stays the same, and the tens digit increases by .
Example: Start at and skip-count forward by s for four numbers.
So the sequence is:
Notice that the ones digit stays , while the tens place increases by . When you reach , adding changes the number to .
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