Isabella put het counter on 12 then moved it back two spaces. 10 is two less than 12. Help her find the missing number.
The missing number is three less than 16. We know that Isabella has to put her counter on 16. The missing number is three less than 16.
So we need to count back three places starting from number 16: one, two, three. Isabella landed on number 13. 13 is three less than 16.