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### Course: Early math review>Unit 6

Lesson 1: Skip counting by 100s

# Skip-counting by 100s

Sal counts by 100s.

## Want to join the conversation?

• if i can count by 5s, 10s, 100s and 1000s will i be able to count by 2000
• Yes you can count by any number! For example, you can count by 369s (hard, but you still could)! I hope this helps!
• Skip counting by 100s must be very easy because just like skip counting by 1s or 10s you need to memorize the 100s. It goes like 100, 200, 300, 400, 500, 600, 700, 800, 900, 1,000?
• So, is there usually a comma between the first number (in the thousands place) and the second number in a number (in the hundreds place) like 1,832?
• The "thousands separator" depends on which country and/or language: some countries use commas, some use spaces, and some use periods. (And for the decimal point, some countries use a comma instead of a period.) For example, for the number "1,234,567.89":

England:
1,234,567.89

France:
1 234 567,89

Spain:
1.234.567,89
• so i can count by 1000 right
• Yeah, you'd be able to count by any number, including 1000
(1 vote)
• how do
I count by 100s
(1 vote)
• Skip-counting by 100s means we keep adding 100 to the starting number.

If the starting number is 387, the next number is 387 + 100 = 487 and the number after that is 487 + 100 = 587 and so on.

Theoretically, this adding of 100 could go on forever and we would end up with the infinite sequence
387, 487, 587, 687, 787, 887, 987, 1087, 1187, 1287, 1387, ...

With a different starting number we get a different sequence.
For example, if the starting number is 8, we get
8, 108, 208, 308, 408, 508, 608, 708, 808, 908, 1008, 1108, ...
• Can we write a zero in the hundred's place?
Is 043 also an acceptable way to write 43?
(1 vote)
• Yes, that is correct. You could put ten zeros in front of 43 and it would still equate to 43. It is an acceptable way, but is unnecessary and not commonly written as such.

Hope this helps!
• Don't you always have to start by 0 when you count by any number?
(1 vote)
• No, you can start on any number. For some people it is easier to start at zero, but you can start on any number as long as you are still doing the task.