(Mathematics 5)

Subtraction of fractions with one renaming

Subtraction of fractions with renaming

In groups of three:

Work out $\frac{5}{8} - \frac{1}{4} .$

Draw a fraction chart.
Find out how many eighths form a quarter.
eighths
Write $\frac{1}{4}$ in form of eighths then subtract from $\frac{5}{8} .$
$\frac{5}{8} - \frac{}{8} = \frac{}{8}$
Discuss your results with other groups.

Work out: $\frac{7}{12} - \frac{1}{4}$

$\frac{7}{12} - \frac{1}{4} = \frac{7}{12} - \frac{3}{12} = \frac{7 - 3}{12} = = \frac{4}{12} = \frac{1}{3}$

$\frac{1}{4} = \frac{1 \times 3}{4 \times 3} = \frac{3}{12}$

$\frac{4}{12} = \frac{4 \div 4}{12 \div 4} = \frac{1}{3}$

$\frac{3}{4} - \frac{1}{2} = \frac{3}{4} - \frac{}{4} = \frac{}{4}$

$\frac{7}{8} - \frac{1}{2} = \frac{7}{8} - \frac{}{8} = \frac{}{8}$

$\frac{11}{12} - \frac{1}{6} = \frac{11}{12} - \frac{}{12} = \frac{}{12}$

$\frac{5}{8} - \frac{1}{4} = \frac{5}{8} - \frac{}{} = \frac{}{}$

$\frac{7}{10} - \frac{3}{5} = \frac{7}{10} - \frac{}{} = \frac{}{}$

$\frac{3}{4} - \frac{7}{12} = \frac{}{} - \frac{7}{12} = \frac{}{} = \frac{1}{}$

Petero bought $\frac{11}{12}$ of a bag of maize. He used $\frac{2}{3}$ of the bag of maize.

A tank was $\frac{7}{8}$ full of water. Some water was used for irrigation until the tank was $\frac{1}{4}$ full.

$\frac{7}{8}$ $\frac{1}{4}$ = $\frac{}{}$

Okemwa inherited $\frac{9}{10}$ of property from his grandfather. He donated $\frac{1}{5}$ of the property to the needy.

$\frac{9}{10}$ $\frac{1}{5}$ = $\frac{}{}$

Maria bought $\frac{3}{4}$ kg of rice. She cooked $\frac{1}{2}$ kg of the rice.

$\frac{3}{4}$ $\frac{1}{2}$ = $\frac{}{}$ (kg)

Subtraction of fractions with one renaming