Revision-add,subtract,ascending

Revision-add,subtract,

ascending

Addition +

1. Check the operator ('+' or '-').

2. Circle the smaller number (3)

3. Show the smaller number (3) in fingers

4. Read out the bigger number (4) and continue count the fingers are showed in ascending order.

5. Sum is 7

Addition +

Addition always Less add Less and get the More.

We can write the statements by changing the position of Less number.

** Addition: the More is always in the last box.

Subtraction -

1. Check the operator ('+' or '-').

2. Circle the smaller number (3)

3. Show the smaller number (3) in fingers

4. Read out the bigger number (15) and continue count the fingers are showed in descending order.

5. Sum is 12.

Subtraction -

Subtraction always More minus Less and get the Less.

We can write the statements by changing the position of Less number.

** Subtraction: the More is always in the first box.

Ascending order

The numberis getting bigger (getting more)