Maths – Y1

Year 1 Maths (PV within 20)

We have recently started looking at numbers within 20. Throughout this unit, we and will learn to identify and correctly record numbers 11-20 focusing on the amount of tens and ones each number is showing. Children will be encouraged to count on from ten to find a total which will support their recording of each number as they begin to realise that all numbers 11-20 have one ten and several ones depending on the number. E.g. 15 – one ten and 5 ones. Children will gradually learn how to find one more and one less of a given number to 20 and record missing numbers on a number 0-20.

Lots of practice over the Christmas holidays would really support your child’s learning in the classroom. Many children are recording ’15’ as ’51’ so we will be working hard on developing their place value knowledge during the first half of the Spring term. We will also be learning how to record numbers 11-20 as words, compare numbers using language such as ‘greater than’ and ‘less than’ and order numbers based on their size. Children should start to understand that all of these numbers have the same amount of tens but have a different amount of ones. This will support them when discussing the value of these numbers.  E.g. “17 is greater than 15 because it has more ones”  or “18 has 1 ten and 8 ones”.

Key questions to support your child at home:

• Can you show me 14 in three different ways?
• How many tens and ones does that number have?
• Can you write these numbers in numerals and words?
• How much more than 10 is 18?
• Is 20 greater than 19 or less than 19?
• What is the same about finding one more and one less?
• When finding one more and one less, which digit changes?
• Can you use a number line to find one more and one less?