# Standard Form How to . . .

```Standard Form
Now have a go yourself . . .
Sorted it- Convert into ordinary numbers:
How to . . .
* One sheet of paper is 9 x 10
–3
cm thick.
Mark wants to put 500 sheets of paper into the paper tray of
his printer. The paper tray is 4 cm deep.
Is the paper tray deep enough for 500 sheets of paper.
(a) 5.239 x 10
3
(b) 4.543 x 10
(d) 6.665 x 10
6
(e) 1.951 x 10
(c) 9.382 x 10
2
(f) 1.905 x 10
-8
(i) 1.01 x 10
-3
(h) 2.541 x 10
-1
(k) 9 x 10
(g) 8.34 x 10
(j)
4
8.88 x 10
-2
(l)
2
5
-5
5.05 x 10
-9
NAILED IT - Convert into standard form:
(a) 65345
(b). 30000
(c) 420000
(d) 545000
(e) 26750.7
(f) 105000000
(g) 0.0078
(h) 0.00000672
(i) 780.5
(j)
(k) 0.00000901
(l) 0.00601
0.0603
MASTERED IT - work out
5
(a) 3.4 x 10 x 2.5 x 10
7
5
3
(b) 8.4 x 10 x 2.1 x 10
4
7
(c) 13.4 x 10 x 3.1 x 10 x 3
5
(d) 3.4 x 10 + 2.1 x 10
4
(f) 2 x 10 - 2.1 x 10
(3)
3
6
4
(e) 2 x 10 - 2.1 x 10
(g) 0.02x10
If p = 3.41 x 10 and q = 12.1 x 10
(h) p x q
2
(k) p ÷ q
www.justmaths.co.uk
6
(i) p ÷ q
-2
-3
3
+ 4.6x10
-4
.Find
(j) 2p x 6q
Exam Questions
Q1. Work out
3.2 × 10
5
- 2.89 × 10
4
Checklist
(3)
7
Q2. p = 5.4 × 10 and q = 3.5 × 10
6
Does it need to be in standard form?
Calculate the value of each of the following. Give all
Keywords
(a) p × q
(2)
(b) 5p + 8q
(2)
(c) p – q
(2)
Things to remember ...
Q3. On a Saturday 1.5 million copies of a newspaper are
printed.
(a) Write 1.5 million in standard form.
(1)
(b) Each copy of the newspaper has 80 pages. Calculate the
What went well ...
total number of pages printed on a Saturday. Give your
(2)
(c) The total weight of the newspapers is 3 × 10
5
kg.
(3)
Teacher comment ..
```