Addition and subtraction using animations, songs and sketches. Shows the relationship between practical problem solving and written calculations.

Addition and subtraction problems shown through animations, songs and sketches. The relationship between practical problem solving and written calculations is made clear.

Addition and subtraction using animations, songs and sketches. The relationship between practical problem solving and written calculations is made clear.

Addition and subtraction using animations, songs and sketches. The relationship between practical problem solving and written calculations is made clear.