To find the total, or sum, by combining two or more parts (addends), or to increase an amount by adding another.

To partition one part from another (the subtrahend from the difference), or to decrease an amount by taking an amount away.

A synonym for add, represented by the symbol +

A synonym for add, represented by the symbol  -

Use knowledge of addition and subtraction facts within 10 to add and subtract within 20

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

Which symbol goes in between the equations to make this correct?

Which equation matches this problem?
Laura and Jacob have 18 pencils. They hand out some and have 5 left. How many did they hand out?

Use addition or subtraction to solve this problem.
Laura and Jacob have 17 pens. 6 pens are red and the rest are green. How many are green?

Use addition or subtraction to solve this problem.
Laura has 12 books and Jacob have 8 books. How many books do they have together?

Complete the sentence: 2 plus 7 is equal to 9, so 12 plus 7 is equal to {{ }}  

Complete the sentence: 8 minus 3 is equal to 5, so 18 minus 3 is equal to {{ }}  

First, Izzy collected 13 stones and then she found 5 more. How many stones does she have now? {{ }} stones

First, Izzy had 19 stickers and then she gave Sofia 7 stickers. How many stickers does Izzy have now? {{ }} stickers

Which symbol should go between 7 and 9 to show that 9 is greater than 7?  7 ___ 9

This lesson will soon be taken down.

Use knowledge of addition and subtraction facts within 10 to add and subtract within 20

Lesson outcome