This quiz addresses the requirements of the National Curriculum KS1 Maths and Numeracy for children aged 5 and 6 in year 1. Specifically this quiz is aimed at the section dealing with recognising one more or one less than a given number.
Finding one more or one less than is all about understanding the order of numbers and knowing where they are in relation to each other. It's about being able to confidently count forwards or backwards and being able to add or subtract one from a number by counting up or down and knowing what is one more or one less than a given number.














Looking at the last digit is often helpful

Try to picture the numbers sitting on a number line


Counting up out loud can sometimes help

Counting up to get to the given number will help to work out one less


One more means adding one more to the units digit

One less means taking one away from the units digit


Imagine the number line in your mind and think about which numbers are next to each other

One more means adding on one by counting up


100 is the last number on a hundred square. 99 comes just before it, so is one less

If you start at zero and count up, the first number you come to is one more than zero
