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Check the Clues 2

Check the Clues 2

Cooperative group problem solving is a deductive reasoning activity where the solution cannot be found without everyone’s contribution. This second volume is suited for Years Four to Eight.

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Home > Topdrawer > Fractions > Good teaching > Dividing > Sharing as division

Sharing as division

Students model problems that require them to cut the items into fractional parts to carry out the sharing process.

For example, share two loaves equally between three people. Each person receives two-thirds of a loaf: 2 ÷ 3 = \(\frac{2}{3}\).

Each loaf is cut into three equal pieces and the six pieces arranged as three groups of two.

Two loaves shared evenly between three people.

Sharing problems build the foundation for understanding fractions as an expression of division, as in \(\frac{2}{3}\) = 2 ÷ 3.

Sharing problems also provide the important opportunity for students to experience the process of re-unitising. Re-unitising occurs when the size of the fraction being used is changed to suit the needs of the problem.

For example, in the problem of three loaves shared equally between four people, the first step could be to halve the loaves. This gives each person one half of a loaf and uses two of the loaves.

The third loaf can then be cut into four equal parts and the sharing continued. So each person gets one half and one quarter, making three quarters of a loaf each. Watch the video The Sharing Process.

 

You can download The Sharing Process video transcript.

 

Sharing diagrams such as the one illustrated above should feature in student recording of their solution strategies.