These two boxes are on the board.

Results in

Results in

Results in

Emptying these onto the board results in

In mathematics

2(8 +

*+ 3(2*

**x***– 1)) = 2(8 +*

**x***+ 6*

**x***– 3) = 2(8 – 3 + 7*

**x***) = 2(5 + 7*

**x***) = 10 + 14*

**x**

**x**Using cards

Gives the same results as

Gives the same results as

Gives the same results as

Gives the same results as

Gives the same results as

Gives the same results as