Question
please could you check the first 2 then explain the method on the other 2
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 don't get how to work this one out
please could you help/explain. thanks.
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 don't get how to work this one out
please could you help/explain. thanks.
Answers
You 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
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
what does E stand for?
bobpursley
E means x 10^ It is often used in computers, calculators, and in ASCII chat as here. It is easier.
Related Questions
A solution of aniline(C6H5NH2, Kb=4.2x10^-10) has a pH of 8.69 at 25 Celsius. What was the initial c...
Check my answer?
What is the order of the numbers from least to greatest?
A= 6.2x10^5, B= 1.1x1...
Which expression represents the quotient below? 4.6x10^5 / 2.3x10^6
A. 2x10^0
B. 2x10^-1
C. 2x1...
Juan is taking a road trip to Pennsylvania. the distance he plans to travel can be written as 2x10^3...