Unit 1: Place value within 1,000
WHY THIS UNIT IS IMPORTANT... This unit is important as it explores 3-digit numbers in depth. For many children, it will be the first time they have met these numbers. This work builds on the place value work that they did in Year 2 and they will extend many of the models and images that they have used previously. Children begin with learning how to count in 100s. They will learn that a 3-digit number is made up of some 100s, 10s and 1s and they will be able to represent this in many ways (for example, on a place value grid with counters or in a part-whole model). They will extend the number line to 1,000 and know where different numbers lie. They will compare and order 3-digit numbers as well as count in 50s. This unit underpins a lot of the subsequent work this year and it is essential that children gain a solid understanding of the key concepts within this unit.