Before, after, and between
The question
? 17
?17
17− 1
1617
- Counting forwards goes up by one, backwards goes down by one. Which way is this gap?
- The gap is before 17, so it is 1 less: 17 − 1.
- 17 − 1 = 16.
How it works.
- 01
Counting forwards goes up by one, backwards goes down by one. Which way is this gap?
- 02
The gap is before 17, so it is 1 less: 17 − 1.
- 03
17 − 1 = 16.