Step 5

1. Explain simple adding and subtracting strategies, using words, pictures and symbols.

2. Use the mathematical symbols of =, <, >

1. Explain simple adding and subtracting strategies, using words, pictures and symbols.

For example: A Boat sailed for 45 minutes for 3 days and one hour for 2 days. How much time did the boat sail altogether?

45 + 45 + 45 + 60 + 60 = t (t stands for time)

or

3 x 45 + 2 x 60 = t (stands for time)

http://www.mathplayground.com/ASB_Swimming_Otters.html

http://www.sheppardsoftware.com/mathgames/makex/makeXAS2_level1.swf

This game uses swf so might not work in your browser

Algebra Levels 2-3

Algebra Level 3

"Putting Pens to Paper" Page 20

"The Pot Luck Paint Company" Page 24

The school library is going to be re-built so the parents are sorting out all the books to keep them in an old classroom for the time being.

Two parents bring over 4 boxes filled with fiction books and two boxes filled with reference books. If each box is filled with 80 books, how many fiction books are there? Write this as an equation using B for books. Solve the equation.

From the boxes they have just delivered, a parent moves quickly to put 40 reference books on the shelf. Then, she takes out another 65 reference books and leaves them on the counter to put out later. How many reference books are left in the boxes? Write this as an equation using R for reference books. Solve the equation.

Next they deal with the non-fiction section. There used to be 445 non-fiction books but 83 went missing and 45 were transferred to another library. How many non-fiction books are there now? Write this as an equation using N for non-fiction books. Solve the equation.

There are 1675 books in total in the library. 150 are still out on loan and 43 books are missing. There are also 27 books that are overdue. How many books are there in the library at the moment? Write this as an equation using B for books. Solve the equation.