Use knowledge of 10 and a bit to solve problems

Maths

In this unit pupils will explain 11-19 as cardinal and ordinal numbers. They will double and halve numbers 6-9 and use addition and subtraction facts to add and subtract within 20. In the future unit pupils will explore the counting sequence for counting to 100 and beyond and represent the numbers from 20-99 in different ways, including marking the position on a number line. 

In prior learning, pupils will have looked for patterns and relationships in number, spotting connections and talking about what they notice. In this unit pupils will explain 11 to 19 as cardinal and ordinal numbers. They will double and halve the numbers 6 to 9 and use known facts to add and subtract within 20.

Composition of numbers 11 to 19

What do we call the total when two parts are added to make the whole?

Which equation matches the part-part-whole model?

Which part part whole model matches this equation? 10 + 5 = 15

Which place value chart represents the ten frames?

Look at the image. Which addition does it represent?

Match the teen number to the number of tens and ones.

Starter Quiz