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Subjects
Mathematics CBSE
Class 6
Knowing our numbers
Estimation of numbers
9.
Expanding brackets
Theory:
Let us understand how brackets are used to expand the numbers and to do the calculation.
Example:
Consider
13
×
106
13
×
106
=
(
10
+
3
)
×
106
=
10
×
106
+
3
×
106
=
10
×
(
100
+
6
)
+
3
×
(
100
+
6
)
=
1000
+
60
+
300
+
18
=
1378
Thus, through the expansion of brackets, we can easily obtain the product of numbers in some cases.
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