X Stäng
Tangentbord:
Arabiskt
Persiskt
Ryskt
Åk 6–9
Start
1. Welcome to Decimals
2. From Fractions to Decimals
3. Comparisons
4. Rounding Off
5. Addition and Subtraction
5.1 Adding and Subtracting parts of the same size
5.2 Adding and Subtracting parts of different sizes
5.3 Methods
5.4 Exercises
6. Multiplication
7. Division
8. Small numbers with words
English/Soomaali
5.1 Addition and Subtraction Part of the Same Size
Words
3 tenths
+
2 tenths
=
5 tenths
Fraction Form
+
=
Pictures
+
=
Decimal Form
0.3
+
0.2
=
0.5
Words
6 tenths
-
2 tenths
=
4 tenths
Fraction Form
-
=
Pictures
-
=
Decimal Form
0.6
-
0.2
=
0.4
Here is an example where we add the parts of the same sort and get a result larger than one.
Words
7 tenths
+
5 tenths
=
1 whole 2 tenths
Fraction Form
+
=
=
Pictures
+
=
Decimal Form
0.7
+
0.5
=
1.2
Here is a last example where we subtract parts of the same sort.
Words
7 fifths
-
4 fifths
=
3 fifths
Fraction Form
-
=
Expanded to tenths
-
=
Pictures
-
=
Decimal Form
1.4
-
0.8
=
0.6