Numeracy Worksheet - Castlebrae Community High School - 2012 Page 12
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47FHS Numeracy
contents page
Multiplication
To multiply decimals we ignore the decimal point(s) until after
we multiply. The point(s) are not necessarily lined up when
setting the question out.
The decimal point gets placed in the answer after multiplication
is complete.
Start by working out 2376 x 6
Example 9
23.76 x 6
Level 2
2 digits after point
2 3 . 7 6
x
6
0 digits after point
2
4
3
+
1 4 2. 5 6
2
The decimal point goes in 2 places from
the end of the answer.
Start by working out 1349 x 3
Example 10 134.9 x 0.3
Level 3
1 3 4 . 6
1 digits after point
x
0 . 3
1 digits after point
1
1
3
+
3 0 . 3 8
2
The decimal point goes in 2 places from
the end of the answer.
Start by working out 1328 x 34
Example 11 132.8 x 3.4
Level 3
2 digits after point
1 3. 2 6
x
3 . 4
1 digits after point
1
1
2
+
5 3 0 4
x4
3
1
+
3 9 7 8 0
The decimal point goes in 3 places from
x30
1 1
the end of the answer.
4 4. 0 8 4
x34
12
L Watson 2012
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