Friday

August 1, 2014

August 1, 2014

Posted by **chelsea** on Thursday, September 10, 2009 at 1:33pm.

1)5.2x10^6 + 3x10^5

5200000+300000=5500000

5.5x10^6

2)4.2x10^5 + 1.28x10^6

420000+1280000=1700000

1.7x10^6

method please

3)6.5x10^-3 - 3.5x10^-9

0.065-0.000000035=0.064999965

how do you convert this number into standard form?

4)400/(5x10^6)

i dont get how to work this one out

please could you help/explain. thanks.

- math - standard form -
**bobpursley**, Thursday, September 10, 2009 at 3:09pmYou did 3) wrong. Using your method..

3)6.5x10^-3 - 3.5x10^-9

0.006 5-0.000 000 003 5=0.0059999965

5.9999965 x 10^-3

Let me show you an easier way. Convert both numbers to the same power.

6.5E-3 - 3.5E-9

6.5E-3 - 3.5E-3E-6

(6.5- .000 0035 )E-3

6.499 99965 E-3

another example

5.2x10^6 + 3x10^5

52.0E5+3E5

55E5 or 5.5E6

Lastly

4)400/(5x10^6)

4E2/5E6= .8E(2-6)=.8E-4=8E-5

- math - standard form -
**chelsea**, Thursday, September 10, 2009 at 3:25pmwhat does E stand for?

- math - standard form -
**bobpursley**, Thursday, September 10, 2009 at 3:36pmE means x 10^ It is often used in computers, calculators, and in ASCII chat as here. It is easier.

**Related Questions**

Chemistry - A solution of aniline(C6H5NH2, Kb=4.2x10^-10) has a pH of 8.69 at ...

Chemistry - In an experiment, 0.0300 moles each of SO3(g), S02(g), and O2(g) ...

Math - Name the property that justifies each step. [(2x100)+(3x10)]+[(1x100)+(...

Chemistry - H3PO4 Ka1= 7.5x10^-3 Ka2= 6.2x10^-8 Ka3=4.2x10-^13 Explain how you ...

multiplying and diving scientific notation - 1)(2.3x10^2)(4.5x10^-7)= 1.035x10...

Math - Write the following number in standard form (4X10 4th power)+(3X10 3rd ...

math - (2x10^5)(3x10^6)

math - (3.5x10^-3)(4.2x10^7)

Physics please help - The engine of a train has a mass of 5x10^4 kg. it can ...

Physics please help - The engine of a train has a mass of 5x10^4 kg. it can ...