Hannah had climbed one seventh of the ladder to the roof when she realised she'd forgotten her phone, so went back down to get it.
Complete the number sentence that describes how far in total Hannah has climbed once she has returned to the bottom of the ladder.
Hannah has climbed $\editable{}$ seventh plus $\editable{}$ seventh of the length of the ladder.
Which of the following scenarios fits the number sentence:
"Bob is now $15$15 nineteenths minus $7$7 nineteenths of a kilometre away from where he started."
Christa had travelled thirteen sixteenths of the distance to school when she realised she had forgotten her electric drill and so went home to get it.
Complete the number sentence that describes how far in total Christa has travelled by the time she arrives back at home.
In science class, Paul measures fourteen ninths of a litre of a chemical and then tips out eight ninths of a litre.
Complete the number sentence that describes how much chemical Paul has left.