I am petrified - petrified of what?
This is a small new person who is finding her way around the world and what it all feels like - why would you worry about whether she meets some arbitrary test set by people who do not know her? - or indeed give a toss about her?
The person who suggested that not giving a flying fuck is the way to go has it bang on.
If you are worried about this now, what are you going to be like when year 6 SATS come round? How much pressure will this poor child feel?
Education is an individual thing - some like some subjects, and others not; some race on from the beginning, some do not; some are destined for academic greatness, some are not; some enjoy school, some do not - but she definitely will not like it if she feels your anxiety.
The only reason teachers emphasise this is because they and the school are judged on these results - NOT your child.
Your child's needs will be assessed by a good teacher as they go along - they will be looking at her NEEDS, not some arbitrary bit of government generated nonsense where her needs are irrelevant.
Chill man; go have some fun - that is what childhood is about.