Åk 6–9
 
English/Soomaali
4.1 With the Same Denominator
To add and subtraction fractions with the same denominator isn’t difficult.  Here are a few examples:



One half
+
One half
=
Two halves
=
One whole
+
=
=
1



One third
+
One third
=
Two thirds
+
=



One eighth
+
Four eighths
=
Five eighths
+
=



+
=
=

-
=

-
=


Addition and subtraction of fractions in mixed form
Here it is important that you have mastered writing numbers in both fraction form and mixed form.

When you add fractions in mixed form, you add the whole numbers separately and the parts separately.

+
=
=

When you subtract fraction in mixes form, it can go wrong if you don’t first convert from mixed form to fraction form.

-
=
-
=
=
-
=
-
=