Addition and Subtraction

Lesson

We can use objects to help us add and take away. The first thing we might need to do is count the number of objects we can see.

Objects that we are taking away will have a cross or a line through them.

We can count the objects to see how many we have after adding or taking away. Sometimes it's easier to count objects than to use a number line.

Which picture shows $2+1$2+1?

- ABCDABCD

Which pictures show $4+4$4+4? Choose all correct answers.

- ABCABC

Which picture shows $8-1$8−1?

- ABCDABCD

Use simple additive strategies with whole numbers and fractions