Completing a whole

Worked solution

1. 1

   Identify the total number of equal parts.

   $\frac{10}{10}=1$

   Ten tenths make the complete strip.

2. 2

   Count the parts that are not blue.

   $10-7=3$

   Remove the seven blue parts from the ten parts altogether.

3. 3

   Write the uncoloured fraction.

   $\frac{3}{10}$

   Three parts remain and each is still one tenth of the strip.

Worked solution

1. 1

   Express the whole in thirds.

   $1=\frac{3}{3}$

   Three one-third pieces make one whole.

2. 2

   Count how many thirds are missing.

   $3-1=2$

   One of the three required pieces is already present.

3. 3

   Check the completing fraction.

   $\frac{1}{3}+\frac{2}{3}=\frac{3}{3}=1$

   Two more thirds join the existing third to fill the whole.